diff --git a/backend/src/Squidex/Areas/Api/Controllers/Schemas/Models/ConfigureUIFieldsDto.cs b/backend/src/Squidex/Areas/Api/Controllers/Schemas/Models/ConfigureUIFieldsDto.cs
index 2fd9bf8f2..32fd97b54 100644
--- a/backend/src/Squidex/Areas/Api/Controllers/Schemas/Models/ConfigureUIFieldsDto.cs
+++ b/backend/src/Squidex/Areas/Api/Controllers/Schemas/Models/ConfigureUIFieldsDto.cs
@@ -5,9 +5,9 @@
 //  All rights reserved. Licensed under the MIT license.
 // ==========================================================================
 
+using System.Collections.Generic;
 using Squidex.Domain.Apps.Core.Schemas;
 using Squidex.Domain.Apps.Entities.Schemas.Commands;
-using Squidex.Infrastructure.Reflection;
 
 namespace Squidex.Areas.Api.Controllers.Schemas.Models
 {
@@ -16,16 +16,28 @@ namespace Squidex.Areas.Api.Controllers.Schemas.Models
         /// <summary>
         /// The name of fields that are used in content lists.
         /// </summary>
-        public FieldNames? FieldsInLists { get; set; }
+        public List<string>? FieldsInLists { get; set; }
 
         /// <summary>
         /// The name of fields that are used in content references.
         /// </summary>
-        public FieldNames? FieldsInReferences { get; set; }
+        public List<string>? FieldsInReferences { get; set; }
 
         public ConfigureUIFields ToCommand()
         {
-            return SimpleMapper.Map(this, new ConfigureUIFields());
+            var command = new ConfigureUIFields();
+
+            if (FieldsInLists != null)
+            {
+                command.FieldsInLists = new FieldNames(FieldsInLists);
+            }
+
+            if (FieldsInReferences != null)
+            {
+                command.FieldsInReferences = new FieldNames(FieldsInReferences);
+            }
+
+            return command;
         }
     }
 }
diff --git a/backend/src/Squidex/Areas/Api/Controllers/Schemas/Models/SchemaDetailsDto.cs b/backend/src/Squidex/Areas/Api/Controllers/Schemas/Models/SchemaDetailsDto.cs
index a1d9eca59..c834b2a2d 100644
--- a/backend/src/Squidex/Areas/Api/Controllers/Schemas/Models/SchemaDetailsDto.cs
+++ b/backend/src/Squidex/Areas/Api/Controllers/Schemas/Models/SchemaDetailsDto.cs
@@ -7,7 +7,7 @@
 
 using System.Collections.Generic;
 using System.ComponentModel.DataAnnotations;
-using Squidex.Domain.Apps.Core.Schemas;
+using System.Linq;
 using Squidex.Domain.Apps.Entities.Schemas;
 using Squidex.Infrastructure.Reflection;
 using Squidex.Shared;
@@ -35,13 +35,13 @@ namespace Squidex.Areas.Api.Controllers.Schemas.Models
         /// The name of fields that are used in content lists.
         /// </summary>
         [Required]
-        public FieldNames FieldsInLists { get; set; }
+        public List<string> FieldsInLists { get; set; }
 
         /// <summary>
         /// The name of fields that are used in content references.
         /// </summary>
         [Required]
-        public FieldNames FieldsInReferences { get; set; }
+        public List<string> FieldsInReferences { get; set; }
 
         /// <summary>
         /// The list of fields.
@@ -58,6 +58,9 @@ namespace Squidex.Areas.Api.Controllers.Schemas.Models
             SimpleMapper.Map(schema.SchemaDef.Scripts, result.Scripts);
             SimpleMapper.Map(schema.SchemaDef.Properties, result.Properties);
 
+            result.FieldsInLists = schema.SchemaDef.FieldsInLists.ToList();
+            result.FieldsInReferences = schema.SchemaDef.FieldsInReferences.ToList();
+
             if (schema.SchemaDef.PreviewUrls.Count > 0)
             {
                 result.PreviewUrls = new Dictionary<string, string>(schema.SchemaDef.PreviewUrls);
diff --git a/backend/src/Squidex/Areas/Api/Controllers/Schemas/Models/UpsertSchemaDto.cs b/backend/src/Squidex/Areas/Api/Controllers/Schemas/Models/UpsertSchemaDto.cs
index 131c514f0..eb6fe9400 100644
--- a/backend/src/Squidex/Areas/Api/Controllers/Schemas/Models/UpsertSchemaDto.cs
+++ b/backend/src/Squidex/Areas/Api/Controllers/Schemas/Models/UpsertSchemaDto.cs
@@ -27,12 +27,12 @@ namespace Squidex.Areas.Api.Controllers.Schemas.Models
         /// <summary>
         /// The names of the fields that should be used in references.
         /// </summary>
-        public FieldNames? FieldsInReferences { get; set; }
+        public List<string>? FieldsInReferences { get; set; }
 
         /// <summary>
         /// The names of the fields that should be shown in lists, including meta fields.
         /// </summary>
-        public FieldNames? FieldsInLists { get; set; }
+        public List<string>? FieldsInLists { get; set; }
 
         /// <summary>
         /// Optional fields.
@@ -72,6 +72,16 @@ namespace Squidex.Areas.Api.Controllers.Schemas.Models
                 SimpleMapper.Map(dto.Scripts, command.Scripts);
             }
 
+            if (dto.FieldsInLists != null)
+            {
+                command.FieldsInLists = new FieldNames(dto.FieldsInLists);
+            }
+
+            if (dto.FieldsInReferences != null)
+            {
+                command.FieldsInReferences = new FieldNames(dto.FieldsInReferences);
+            }
+
             if (dto.Fields != null)
             {
                 command.Fields = new List<UpsertSchemaField>();