Use custom guid type again.

src/Squidex.Domain.Apps.Entities/Contents/GraphQL/Types/AllTypes.cs

@@ -18,7 +18,7 @@ namespace Squidex.Domain.Apps.Entities.Contents.GraphQL.Types
 
         public static readonly IGraphType Int = new IntGraphType();
 
-        public static readonly IGraphType Guid = new GuidGraphType();
+        public static readonly IGraphType Guid = new GuidGraphType2();
 
         public static readonly IGraphType Date = new DateTimeGraphType();
 
@@ -34,7 +34,7 @@ namespace Squidex.Domain.Apps.Entities.Contents.GraphQL.Types
 
         public static readonly IGraphType Boolean = new BooleanGraphType();
 
-        public static readonly IGraphType References = new ListGraphType<NonNullGraphType<GuidGraphType>>();
+        public static readonly IGraphType References = new ListGraphType<NonNullGraphType<GuidGraphType2>>();
 
         public static readonly IGraphType NonNullInt = new NonNullGraphType(Int);