diff --git a/backend/src/Squidex.Domain.Apps.Core.Model/Schemas/MetaFields.cs b/backend/src/Squidex.Domain.Apps.Core.Model/Schemas/MetaFields.cs
deleted file mode 100644
index c00de35d4..000000000
--- a/backend/src/Squidex.Domain.Apps.Core.Model/Schemas/MetaFields.cs
+++ /dev/null
@@ -1,46 +0,0 @@
-// ==========================================================================
-//  Squidex Headless CMS
-// ==========================================================================
-//  Copyright (c) Squidex UG (haftungsbeschraenkt)
-//  All rights reserved. Licensed under the MIT license.
-// ==========================================================================
-
-using System.Collections.Generic;
-using System.Reflection;
-
-namespace Squidex.Domain.Apps.Core.Schemas
-{
-    public static class MetaFields
-    {
-        private static readonly HashSet<string> AllList = new HashSet<string>();
-
-        public static ISet<string> All
-        {
-            get { return AllList; }
-        }
-
-        public static readonly string Id = "meta.id";
-        public static readonly string Created = "meta.created";
-        public static readonly string CreatedByAvatar = "meta.createdBy.avatar";
-        public static readonly string CreatedByName = "meta.createdBy.name";
-        public static readonly string LastModified = "meta.lastModified";
-        public static readonly string LastModifiedByAvatar = "meta.lastModifiedBy.avatar";
-        public static readonly string LastModifiedByName = "meta.lastModifiedBy.name";
-        public static readonly string Status = "meta.status";
-        public static readonly string StatusColor = "meta.status.color";
-        public static readonly string Version = "meta.version";
-
-        static MetaFields()
-        {
-            foreach (var field in typeof(MetaFields).GetFields(BindingFlags.Public | BindingFlags.Static))
-            {
-                if (field.FieldType == typeof(string))
-                {
-                    var value = field.GetValue(null) as string;
-
-                    AllList.Add(value!);
-                }
-            }
-        }
-    }
-}
diff --git a/backend/src/Squidex.Domain.Apps.Entities/Schemas/Guards/GuardSchema.cs b/backend/src/Squidex.Domain.Apps.Entities/Schemas/Guards/GuardSchema.cs
index 173826c50..353f84e2d 100644
--- a/backend/src/Squidex.Domain.Apps.Entities/Schemas/Guards/GuardSchema.cs
+++ b/backend/src/Squidex.Domain.Apps.Entities/Schemas/Guards/GuardSchema.cs
@@ -5,6 +5,7 @@
 //  All rights reserved. Licensed under the MIT license.
 // ==========================================================================
 
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using Squidex.Domain.Apps.Core;
@@ -113,8 +114,8 @@ namespace Squidex.Domain.Apps.Entities.Schemas.Guards
 
             Validate.It(() => "Cannot configure UI fields.", e =>
             {
-                ValidateFieldNames(schema, command.FieldsInLists, nameof(command.FieldsInLists), e, true);
-                ValidateFieldNames(schema, command.FieldsInReferences, nameof(command.FieldsInReferences), e);
+                ValidateFieldNames(schema, command.FieldsInLists, nameof(command.FieldsInLists), e, IsMetaField);
+                ValidateFieldNames(schema, command.FieldsInReferences, nameof(command.FieldsInReferences), e, IsNotAllowed);
             });
         }
 
@@ -162,8 +163,8 @@ namespace Squidex.Domain.Apps.Entities.Schemas.Guards
                 }
             }
 
-            ValidateFieldNames(command, command.FieldsInLists, nameof(command.FieldsInLists), e, true);
-            ValidateFieldNames(command, command.FieldsInReferences, nameof(command.FieldsInReferences), e);
+            ValidateFieldNames(command, command.FieldsInLists, nameof(command.FieldsInLists), e, IsMetaField);
+            ValidateFieldNames(command, command.FieldsInReferences, nameof(command.FieldsInReferences), e, IsNotAllowed);
         }
 
         private static void ValidateRootField(UpsertSchemaField field, UpsertCommand command, string prefix, AddValidation e)
@@ -261,7 +262,7 @@ namespace Squidex.Domain.Apps.Entities.Schemas.Guards
             }
         }
 
-        private static void ValidateFieldNames(Schema schema, FieldNames? fields, string path, AddValidation e, bool withMeta = false)
+        private static void ValidateFieldNames(Schema schema, FieldNames? fields, string path, AddValidation e, Func<string, bool> isAllowed)
         {
             if (fields != null)
             {
@@ -279,7 +280,7 @@ namespace Squidex.Domain.Apps.Entities.Schemas.Guards
                     {
                         e(Not.Defined("Field"), fieldPrefix);
                     }
-                    else if (field == null && (!withMeta || !MetaFields.All.Contains(fieldName)))
+                    else if (field == null && !isAllowed(fieldName))
                     {
                         e($"Field is not part of the schema.", fieldPrefix);
                     }
@@ -299,7 +300,7 @@ namespace Squidex.Domain.Apps.Entities.Schemas.Guards
             }
         }
 
-        private static void ValidateFieldNames(UpsertCommand command, FieldNames? fields, string path, AddValidation e, bool withMeta = false)
+        private static void ValidateFieldNames(UpsertCommand command, FieldNames? fields, string path, AddValidation e, Func<string, bool> isAllowed)
         {
             if (fields != null)
             {
@@ -317,7 +318,7 @@ namespace Squidex.Domain.Apps.Entities.Schemas.Guards
                     {
                         e(Not.Defined("Field"), fieldPrefix);
                     }
-                    else if (field == null && (!withMeta || !MetaFields.All.Contains(fieldName)))
+                    else if (field == null && !isAllowed(fieldName))
                     {
                         e($"Field is not part of the schema.", fieldPrefix);
                     }
@@ -337,6 +338,16 @@ namespace Squidex.Domain.Apps.Entities.Schemas.Guards
             }
         }
 
+        private static bool IsMetaField(string field)
+        {
+            return field.StartsWith("meta.", StringComparison.Ordinal);
+        }
+
+        private static bool IsNotAllowed(string field)
+        {
+            return false;
+        }
+
         private static void ValidateFieldIds<T>(ReorderFields c, IReadOnlyDictionary<long, T> fields, AddValidation e)
         {
             if (c.FieldIds != null && (c.FieldIds.Count != fields.Count || c.FieldIds.Any(x => !fields.ContainsKey(x))))