diff --git a/AirFighter/SetGeneric.cs b/AirFighter/SetGeneric.cs
index 15bf012..b0b4df6 100644
--- a/AirFighter/SetGeneric.cs
+++ b/AirFighter/SetGeneric.cs
@@ -20,8 +20,6 @@ namespace ProjectAirFighter.Generics
 
         public int Insert(T airplane)
         {
-            if (_places[Count-1] != null)
-                return -1;
             return Insert(airplane, 0);
         }