Change CreateMorphType back to CreateChange

Author: myieye

backend/FwLite/LcmCrdt/Changes/CreateMorphTypeChange.cs

@@ -8,7 +8,7 @@
 
 namespace LcmCrdt.Changes;
 
-public class CreateMorphTypeChange : Change<MorphType>, ISelfNamedType<CreateMorphTypeChange>
+public class CreateMorphTypeChange : CreateChange<MorphType>, ISelfNamedType<CreateMorphTypeChange>
 {
     [SetsRequiredMembers]
     public CreateMorphTypeChange(MorphType morphType) : base(morphType.Id)
@@ -58,10 +58,4 @@ public override async ValueTask<MorphType> NewEntity(Commit commit, IChangeConte
             DeletedAt = alreadyExists ? commit.DateTime : null
         };
     }
-
-    public override ValueTask ApplyChange(MorphType entity, IChangeContext context)
-    {
-        //don't do anything here, CreateMorphTypeChange is used in a migration, and a change to create the same morph type may happen multiple times
-        return ValueTask.CompletedTask;
-    }
 }