diff --git a/LawCompany/LawCompanyBusinessLogic/BusinessLogics/HearingLogic.cs b/LawCompany/LawCompanyBusinessLogic/BusinessLogics/HearingLogic.cs
index 08c0aef..29cfe35 100644
--- a/LawCompany/LawCompanyBusinessLogic/BusinessLogics/HearingLogic.cs
+++ b/LawCompany/LawCompanyBusinessLogic/BusinessLogics/HearingLogic.cs
@@ -1,139 +1,146 @@
-using LawCompanyContracts.BindingModels;
+using LawCompanyDataModels.Models;
+using LawCompanyContracts.BindingModels;
 using LawCompanyContracts.BusinessLogicContracts;
 using LawCompanyContracts.SearchModels;
 using LawCompanyContracts.StoragesContracts;
 using LawCompanyContracts.ViewModels;
-using LawCompanyDataModels.Models;
 using Microsoft.Extensions.Logging;
 
 namespace LawCompanyBusinessLogic.BusinessLogics
 {
-    public class HearingLogic : IHearingLogic
-    {
-        private readonly ILogger _logger;
-        private readonly IHearingStorage _hearingStorage;
+	public class HearingLogic : IHearingLogic
+	{
+		private readonly ILogger _logger;
+		private readonly IHearingStorage _hearingStorage;
 
-        public HearingLogic(ILogger<HearingLogic> logger, IHearingStorage hearingStorage)
-        {
-            _logger = logger;
-            _hearingStorage = hearingStorage;
-        }
+		public HearingLogic(ILogger<HearingLogic> logger, IHearingStorage hearingStorage)
+		{
+			_logger = logger;
+			_hearingStorage = hearingStorage;
+		}
 
-        public bool Create(HearingBindingModel model)
-        {
-            CheckModel(model);
-            if (_hearingStorage.Insert(model) == null)
-            {
-                _logger.LogWarning("Insert operation failed");
-                return false;
-            }
-            return true;
-        }
+		public bool Create(HearingBindingModel model)
+		{
+			CheckModel(model);
+			if (_hearingStorage.Insert(model) == null)
+			{
+				_logger.LogWarning("Insert operation failed");
+				return false;
+			}
+			return true;
+		}
 
-        public bool Delete(HearingBindingModel model)
-        {
-            CheckModel(model, false);
-            _logger.LogInformation("Delete. Id:{Id}", model.Id);
-            if (_hearingStorage.Delete(model) == null)
-            {
-                _logger.LogWarning("Delete operation failed");
-                return false;
-            }
-            return true;
-        }
+		public bool Delete(HearingBindingModel model)
+		{
+			CheckModel(model, false);
+			_logger.LogInformation("Delete. Id:{Id}", model.Id);
+			if (_hearingStorage.Delete(model) == null)
+			{
+				_logger.LogWarning("Delete operation failed");
+				return false;
+			}
+			return true;
+		}
 
-        public HearingViewModel? ReadElement(HearingSearchModel model)
-        {
-            if (model == null)
-            {
-                throw new ArgumentNullException(nameof(model));
-            }
-            _logger.LogInformation("ReadElement. HearingDate:{HearingDate}. Id:{Id}", model.HearingDate, model.Id);
-            var element = _hearingStorage.GetElement(model);
-            if (element == null)
-            {
-                _logger.LogWarning("ReadElement element not found");
-                return null;
-            }
-            _logger.LogInformation("ReadElement find. Id:{Id}", element.Id);
-            return element;
-        }
+		public HearingViewModel? ReadElement(HearingSearchModel model)
+		{
+			if (model == null)
+			{
+				throw new ArgumentNullException(nameof(model));
+			}
+			_logger.LogInformation("ReadElement. HearingDate:{HearingDate}. Id:{Id}", model.HearingDate, model.Id);
+			var element = _hearingStorage.GetElement(model);
+			if (element == null)
+			{
+				_logger.LogWarning("ReadElement element not found");
+				return null;
+			}
+			_logger.LogInformation("ReadElement find. Id:{Id}", element.Id);
+			return element;
+		}
 
-        public List<HearingViewModel>? ReadList(HearingSearchModel? model)
-        {
-            _logger.LogInformation("ReadList. HearingDate:{HearingDate}.Id:{Id}", model?.HearingDate, model?.Id);
-            var list = model == null ? _hearingStorage.GetFullList() : _hearingStorage.GetFilteredList(model);
-            if (list == null)
-            {
-                _logger.LogWarning("ReadList return null list");
-                return null;
-            }
-            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
-            return list;
-        }
+		public List<HearingViewModel>? ReadList(HearingSearchModel? model)
+		{
+			_logger.LogInformation("ReadList. HearingDate:{HearingDate}.Id:{Id}", model?.HearingDate, model?.Id);
+			var list = model == null ? _hearingStorage.GetFullList() : _hearingStorage.GetFilteredList(model);
+			if (list == null)
+			{
+				_logger.LogWarning("ReadList return null list");
+				return null;
+			}
+			_logger.LogInformation("ReadList. Count:{Count}", list.Count);
+			return list;
+		}
 
-        public bool Update(HearingBindingModel model)
-        {
-            CheckModel(model);
-            if (_hearingStorage.Update(model) == null)
-            {
-                _logger.LogWarning("Update operation failed");
-                return false;
-            }
-            return true;
-        }
-        public bool AddLawyerToHearing(HearingSearchModel model, ILawyerModel lawyer)
-        {
-            if (model == null)
-            {
-                throw new ArgumentNullException(nameof(model));
-            }
+		public bool Update(HearingBindingModel model)
+		{
+			CheckModel(model);
+			if (_hearingStorage.Update(model) == null)
+			{
+				_logger.LogWarning("Update operation failed");
+				return false;
+			}
+			return true;
+		}
+		public bool AddLawyerToHearing(HearingSearchModel model, ILawyerModel lawyer)
+		{
+			if (model == null)
+			{
+				throw new ArgumentNullException(nameof(model));
+			}
 
-            var element = _hearingStorage.GetElement(model);
+			var element = _hearingStorage.GetElement(model);
 
-            if (element == null)
-            {
-                return false;
-            }
+			if (element == null)
+			{
+				return false;
+			}
+			if (element.HearingLawyers.ContainsKey(lawyer.Id))
+			{
+				return false;
+			}
+			element.HearingLawyers[lawyer.Id] = lawyer;
 
-            element.HearingLawyers[lawyer.Id] = lawyer;
+			_hearingStorage.Update(new()
+			{
+				Id = element.Id,
+				HearingDate = element.HearingDate,
+				Judge = element.Judge,
+				HearingLawyers = element.HearingLawyers,
+				GuarantorId = element.GuarantorId,
+			});
 
-            _hearingStorage.Update(new()
-            {
-                Id = element.Id,
-                HearingDate = element.HearingDate,
-                Judge = element.Judge,
-                HearingLawyers = element.HearingLawyers,
-                GuarantorId = element.GuarantorId,
-            });
+			return true;
+		}
+		private void CheckModel(HearingBindingModel model, bool withParams = true)
+		{
+			if (model == null)
+			{
+				throw new ArgumentNullException(nameof(model));
+			}
+			if (!withParams)
+			{
+				return;
+			}
+			if (string.IsNullOrEmpty(model.Judge))
+			{
+				throw new ArgumentNullException("Не указан суд",
+			   nameof(model.Judge));
+			}
+			if (string.IsNullOrEmpty((model.HearingDate).ToString()))
+			{
+				throw new ArgumentNullException("Не поставлено время", nameof(model.HearingDate));
+			}
+			_logger.LogInformation("Hearing. HearingDate:{HearingDate}. Id: {Id}  ", model.HearingDate, model.Id);
+			var element = _hearingStorage.GetElement(new HearingSearchModel
+			{
+				HearingDate = model.HearingDate
 
-            return true;
-        }
-        private void CheckModel(HearingBindingModel model, bool withParams = true)
-        {
-            if (model == null)
-            {
-                throw new ArgumentNullException(nameof(model));
-            }
-            if (!withParams)
-            {
-                return;
-            }
-            if (string.IsNullOrEmpty((model.HearingDate).ToString()))
-            {
-                throw new ArgumentNullException("Не поставлено время", nameof(model.HearingDate));
-            }
-
-            _logger.LogInformation("Hearing. HearingDate:{HearingDate}. Id: {Id}  ", model.HearingDate, model.Id);
-            var element = _hearingStorage.GetElement(new HearingSearchModel
-            {
-                HearingDate = model.HearingDate
-
-            });
-            if (element != null && element.Id != model.Id)
-            {
-                throw new InvalidOperationException("На данное время уже назначено слушание");
-            }
-        }
-    }
-}
\ No newline at end of file
+			});
+			if (element != null && element.Id != model.Id)
+			{
+				throw new InvalidOperationException("На данное время уже назначено слушание");
+			}
+		}
+	}
+}
diff --git a/LawCompany/LawCompanyContracts/BindingModels/HearingBindingModel.cs b/LawCompany/LawCompanyContracts/BindingModels/HearingBindingModel.cs
index 905f0a5..df8bf7c 100644
--- a/LawCompany/LawCompanyContracts/BindingModels/HearingBindingModel.cs
+++ b/LawCompany/LawCompanyContracts/BindingModels/HearingBindingModel.cs
@@ -2,12 +2,12 @@
 
 namespace LawCompanyContracts.BindingModels
 {
-    public class HearingBindingModel : IHearingModel
-    {
-        public int Id { get; set; }
-        public DateTime HearingDate { get; set; }
-        public string Judge { get; set; } = string.Empty;
-        public int GuarantorId { get; set; }
-        public Dictionary<int, ILawyerModel> HearingLawyers { get; set; } = new();
-    }
+	public class HearingBindingModel : IHearingModel
+	{
+		public int Id { get; set; }
+		public DateTime HearingDate { get; set; }
+		public string Judge { get; set; } = string.Empty;
+		public int GuarantorId { get; set; }
+		public Dictionary<int, ILawyerModel> HearingLawyers { get; set; } = new();
+	}
 }
diff --git a/LawCompany/LawCompanyContracts/BindingModels/LawyerBindingModel.cs b/LawCompany/LawCompanyContracts/BindingModels/LawyerBindingModel.cs
index 3dc9c83..19090b9 100644
--- a/LawCompany/LawCompanyContracts/BindingModels/LawyerBindingModel.cs
+++ b/LawCompany/LawCompanyContracts/BindingModels/LawyerBindingModel.cs
@@ -8,6 +8,6 @@ namespace LawCompanyContracts.BindingModels
         public string FIO { get; set; } = string.Empty;
         public string Phone { get; set; } = string.Empty;
         public string Email { get; set; } = string.Empty;
-        public int GuarantorId { get; set; }
+        public int? GuarantorId { get; set; }
     }
 }
diff --git a/LawCompany/LawCompanyContracts/ViewModels/IHearingViewModel.cs b/LawCompany/LawCompanyContracts/ViewModels/IHearingViewModel.cs
index 9a7552f..684dc53 100644
--- a/LawCompany/LawCompanyContracts/ViewModels/IHearingViewModel.cs
+++ b/LawCompany/LawCompanyContracts/ViewModels/IHearingViewModel.cs
@@ -3,17 +3,15 @@ using System.ComponentModel;
 
 namespace LawCompanyContracts.ViewModels
 {
-    public class HearingViewModel : IHearingModel
-    {
-        [DisplayName("Номер слушания")]
-        public int Id { get; set; }
-        [DisplayName("Дата слушания")]
-        public DateTime HearingDate { get; set; }
-        [DisplayName("Суд")]
-        public string Judge { get; set; } = string.Empty;
-        [DisplayName("Имя поручителя")]
-        public string GuarantorName { get; set; } = string.Empty;
-        public int GuarantorId { get; set; }
-        public Dictionary<int, ILawyerModel> HearingLawyers { get; set; } = new();
-    }
-}
\ No newline at end of file
+	public class HearingViewModel : IHearingModel
+	{
+		[DisplayName("Номер слушания")]
+		public int Id { get; set; }
+		[DisplayName("Дата слушания")]
+		public DateTime HearingDate { get; set; }
+		[DisplayName("Суд")]
+		public string Judge { get; set; } = string.Empty;
+		public int GuarantorId { get; set; }
+		public Dictionary<int, ILawyerModel> HearingLawyers { get; set; } = new();
+	}
+}
diff --git a/LawCompany/LawCompanyContracts/ViewModels/ILawyerViewModel.cs b/LawCompany/LawCompanyContracts/ViewModels/ILawyerViewModel.cs
index 375d861..37baf6b 100644
--- a/LawCompany/LawCompanyContracts/ViewModels/ILawyerViewModel.cs
+++ b/LawCompany/LawCompanyContracts/ViewModels/ILawyerViewModel.cs
@@ -13,6 +13,6 @@ namespace LawCompanyContracts.ViewModels
         public string Phone { get; set; } = string.Empty;
         [DisplayName("E-mail юриста")]
         public string Email { get; set; } = string.Empty;
-        public int GuarantorId { get; set; }
+        public int? GuarantorId { get; set; }
     }
 }
\ No newline at end of file
diff --git a/LawCompany/LawCompanyDataModels/Models/ILawyerModel.cs b/LawCompany/LawCompanyDataModels/Models/ILawyerModel.cs
index 1cdf57b..4c72d32 100644
--- a/LawCompany/LawCompanyDataModels/Models/ILawyerModel.cs
+++ b/LawCompany/LawCompanyDataModels/Models/ILawyerModel.cs
@@ -11,6 +11,6 @@ namespace LawCompanyDataModels.Models
 		string FIO { get; }
 		string Phone { get; }
 		string Email { get; }
-		public int GuarantorId { get; }
+		public int? GuarantorId { get; }
 	}
 }
diff --git a/LawCompany/LawCompanyDatabaseImplement/Models/Guarantor.cs b/LawCompany/LawCompanyDatabaseImplement/Models/Guarantor.cs
index dee00dd..feda3a9 100644
--- a/LawCompany/LawCompanyDatabaseImplement/Models/Guarantor.cs
+++ b/LawCompany/LawCompanyDatabaseImplement/Models/Guarantor.cs
@@ -1,71 +1,71 @@
-using LawCompanyContracts.BindingModels;
+using LawCompanyDataModels.Models;
+using LawCompanyContracts.BindingModels;
 using LawCompanyContracts.ViewModels;
-using LawCompanyDatabaseImplement.Models;
-using LawCompanyDataModels.Models;
 using System.ComponentModel.DataAnnotations;
 using System.ComponentModel.DataAnnotations.Schema;
+using LawFirmDatabaseImplement.Models;
 
-namespace LawFirmDatabaseImplement.Models
+namespace LawCompanyDatabaseImplement.Models
 {
-    public class Guarantor : IGuarantorModel
-    {
-        public int Id { get; private set; }
-        [Required]
-        public string FIO { get; private set; } = string.Empty;
-        [Required]
-        public string Email { get; private set; } = string.Empty;
-        [Required]
-        public string Password { get; private set; } = string.Empty;
-        [ForeignKey("GuarantorId")]
-        public virtual List<Hearing> Hearings { get; set; } = new();
-        [ForeignKey("GuarantorId")]
-        public virtual List<Lawyer> Lawyers { get; set; } = new();
-        [ForeignKey("GuarantorId")]
-        public virtual List<Consultation> Consultations { get; set; } = new();
+	public class Guarantor : IGuarantorModel
+	{
+		public int Id { get; private set; }
+		[Required]
+		public string FIO { get; private set; } = string.Empty;
+		[Required]
+		public string Email { get; private set; } = string.Empty;
+		[Required]
+		public string Password { get; private set; } = string.Empty;
+		[ForeignKey("GuarantorId")]
+		public virtual List<Hearing> Hearings { get; set; } = new();
+		[ForeignKey("GuarantorId")]
+		public virtual List<Lawyer> Lawyers { get; set; } = new();
+		[ForeignKey("GuarantorId")]
+		public virtual List<Consultation> Consultations { get; set; } = new();
 
-        public static Guarantor? Create(GuarantorBindingModel? model)
-        {
-            if (model == null)
-            {
-                return null;
-            }
-            return new Guarantor()
-            {
-                Id = model.Id,
-                FIO = model.FIO,
-                Email = model.Email,
-                Password = model.Password,
-            };
-        }
+		public static Guarantor? Create(LawCompanyDatabase context, GuarantorBindingModel? model)
+		{
+			if (model == null)
+			{
+				return null;
+			}
+			return new Guarantor()
+			{
+				Id = model.Id,
+				FIO = model.FIO,
+				Email = model.Email,
+				Password = model.Password,
+			};
+		}
 
-        public static Guarantor Create(GuarantorViewModel model)
-        {
-            return new Guarantor
-            {
-                Id = model.Id,
-                FIO = model.FIO,
-                Email = model.Email,
-                Password = model.Password,
-            };
-        }
+		public static Guarantor Create(GuarantorViewModel model)
+		{
+			return new Guarantor
+			{
+				Id = model.Id,
+				FIO = model.FIO,
+				Email = model.Email,
+				Password = model.Password,
+			};
+		}
 
-        public void Update(GuarantorBindingModel? model)
-        {
-            if (model == null)
-            {
-                return;
-            }
-            FIO = model.FIO;
-            Email = model.Email;
-            Password = model.Password;
-        }
+		public void Update(GuarantorBindingModel? model)
+		{
+			if (model == null)
+			{
+				return;
+			}
+			FIO = model.FIO;
+			Email = model.Email;
+			Password = model.Password;
+		}
 
-        public GuarantorViewModel GetViewModel => new()
-        {
-            Id = Id,
-            FIO = FIO,
-            Email = Email,
-            Password = Password,
-        };
-    }
-}
\ No newline at end of file
+		public GuarantorViewModel GetViewModel => new()
+		{
+			Id = Id,
+			FIO = FIO,
+			Email = Email,
+			Password = Password,
+		};
+	}
+}
diff --git a/LawCompany/LawCompanyDatabaseImplement/Models/Lawyer.cs b/LawCompany/LawCompanyDatabaseImplement/Models/Lawyer.cs
index 8a927bd..c7b638a 100644
--- a/LawCompany/LawCompanyDatabaseImplement/Models/Lawyer.cs
+++ b/LawCompany/LawCompanyDatabaseImplement/Models/Lawyer.cs
@@ -1,71 +1,72 @@
-using LawCompanyContracts.BindingModels;
+using LawCompanyDataModels.Models;
+using LawCompanyContracts.BindingModels;
 using LawCompanyContracts.ViewModels;
-using LawCompanyDatabaseImplement.Models;
-using LawCompanyDataModels.Models;
 using System.ComponentModel.DataAnnotations;
 using System.ComponentModel.DataAnnotations.Schema;
+using System.ComponentModel.Design;
 
 
-namespace LawFirmDatabaseImplement.Models
+namespace LawCompanyDatabaseImplement.Models
 {
-    public class Lawyer : ILawyerModel
-    {
-        public int Id { get; private set; }
-        [Required]
-        public string FIO { get; private set; } = string.Empty;
-        [Required]
-        public string Email { get; private set; } = string.Empty;
-        [Required]
-        public string Phone { get; private set; } = string.Empty;
-        [ForeignKey("LawyerId")]
-        public virtual List<HearingLawyer> HearingLawyers { get; set; } = new();
-        [ForeignKey("LawyerId")]
-        public virtual List<ConsultationLawyer> ConsultationLawyers { get; set; } = new();
-        public int GuarantorId { get; set; }
+	public class Lawyer : ILawyerModel
+	{
+		public int Id { get; private set; }
+		[Required]
+		public string FIO { get; private set; } = string.Empty;
+		[Required]
+		public string Email { get; private set; } = string.Empty;
+		[Required]
+		public string Phone { get; private set; } = string.Empty;
+		[ForeignKey("LawyerId")]
+		public virtual List<HearingLawyer> HearingLawyers { get; set; } = new();
+		[ForeignKey("LawyerId")]
+		public virtual List<ConsultationLawyer> ConsultationLawyers { get; set; } = new();
+		public int? GuarantorId { get; set; }
 
-        public static Lawyer? Create(LawyerBindingModel? model)
-        {
-            if (model == null)
-            {
-                return null;
-            }
-            return new Lawyer()
-            {
-                Id = model.Id,
-                FIO = model.FIO,
-                Email = model.Email,
-                Phone = model.Phone,
-                GuarantorId = model.GuarantorId,
-            };
-        }
-        public static Lawyer Create(LawyerViewModel model)
-        {
-            return new Lawyer
-            {
-                Id = model.Id,
-                FIO = model.FIO,
-                Email = model.Email,
-                Phone = model.Phone,
-                GuarantorId = model.GuarantorId,
-            };
-        }
-        public void Update(LawyerBindingModel? model)
-        {
-            if (model == null)
-            {
-                return;
-            }
-            FIO = model.FIO;
-            Email = model.Email;
-            Phone = model.Phone;
-        }
-        public LawyerViewModel GetViewModel => new()
-        {
-            Id = Id,
-            FIO = FIO,
-            Email = Email,
-            Phone = Phone,
-            GuarantorId = GuarantorId
-        };
-    }
-}
\ No newline at end of file
+		public static Lawyer? Create(LawCompanyDatabase context, LawyerBindingModel? model)
+		{
+			if (model == null)
+			{
+				return null;
+			}
+			return new Lawyer()
+			{
+				Id = model.Id,
+				FIO = model.FIO,
+				Email = model.Email,
+				Phone = model.Phone,
+				GuarantorId = model.GuarantorId,
+			};
+		}
+		public static Lawyer Create(LawyerViewModel model)
+		{
+			return new Lawyer
+			{
+				Id = model.Id,
+				FIO = model.FIO,
+				Email = model.Email,
+				Phone = model.Phone,
+				GuarantorId = model.GuarantorId,
+			};
+		}
+		public void Update(LawyerBindingModel? model)
+		{
+			if (model == null)
+			{
+				return;
+			}
+			FIO = model.FIO;
+			Email = model.Email;
+			Phone = model.Phone;
+			if (!model.GuarantorId.HasValue) GuarantorId = model.GuarantorId;
+		}
+		public LawyerViewModel GetViewModel => new()
+		{
+			Id = Id,
+			FIO = FIO,
+			Email = Email,
+			Phone = Phone,
+			GuarantorId = GuarantorId
+		};
+	}
+}