diff --git a/src/Umbraco.Cms.ManagementApi/DependencyInjection/MappingBuilderExtensions.cs b/src/Umbraco.Cms.ManagementApi/DependencyInjection/MappingBuilderExtensions.cs
index 109d9a9f7c..298fc0090a 100644
--- a/src/Umbraco.Cms.ManagementApi/DependencyInjection/MappingBuilderExtensions.cs
+++ b/src/Umbraco.Cms.ManagementApi/DependencyInjection/MappingBuilderExtensions.cs
@@ -6,7 +6,6 @@ using Umbraco.Cms.ManagementApi.Mapping.Installer;
 using Umbraco.Cms.ManagementApi.Mapping.Languages;
 using Umbraco.Cms.ManagementApi.Mapping.Relation;
 using Umbraco.Cms.ManagementApi.Mapping.TrackedReferences;
-using Umbraco.New.Cms.Infrastructure.Persistence.Mappers;
 
 namespace Umbraco.Cms.ManagementApi.DependencyInjection;
 
@@ -17,7 +16,6 @@ public static class MappingBuilderExtensions
         builder.WithCollectionBuilder<MapDefinitionCollectionBuilder>()
             .Add<DictionaryViewModelMapDefinition>()
             .Add<TrackedReferenceViewModelsMapDefinition>()
-            .Add<RelationModelMapDefinition>()
             .Add<RelationViewModelsMapDefinition>()
             .Add<LanguageViewModelsMapDefinition>()
             .Add<InstallerViewModelsMapDefinition>()
diff --git a/src/Umbraco.Infrastructure/DependencyInjection/UmbracoBuilder.MappingProfiles.cs b/src/Umbraco.Infrastructure/DependencyInjection/UmbracoBuilder.MappingProfiles.cs
index 05fc2f125c..86c35d1099 100644
--- a/src/Umbraco.Infrastructure/DependencyInjection/UmbracoBuilder.MappingProfiles.cs
+++ b/src/Umbraco.Infrastructure/DependencyInjection/UmbracoBuilder.MappingProfiles.cs
@@ -3,6 +3,7 @@ using Umbraco.Cms.Core.DependencyInjection;
 using Umbraco.Cms.Core.Mapping;
 using Umbraco.Cms.Core.Models.Mapping;
 using Umbraco.Cms.Core.Security;
+using Umbraco.Cms.Infrastructure.Mapping;
 using Umbraco.Extensions;
 
 namespace Umbraco.Cms.Infrastructure.DependencyInjection;
@@ -23,6 +24,7 @@ public static partial class UmbracoBuilderExtensions
             .Add<ContentTypeMapDefinition>()
             .Add<DataTypeMapDefinition>()
             .Add<EntityMapDefinition>()
+            .Add<RelationModelMapDefinition>()
             .Add<DictionaryMapDefinition>()
             .Add<MacroMapDefinition>()
             .Add<RedirectUrlMapDefinition>()
diff --git a/src/Umbraco.New.Cms.Infrastructure/Persistence/Mappers/RelationModelMapDefinition.cs b/src/Umbraco.Infrastructure/Mapping/RelationModelMapDefinition.cs
similarity index 94%
rename from src/Umbraco.New.Cms.Infrastructure/Persistence/Mappers/RelationModelMapDefinition.cs
rename to src/Umbraco.Infrastructure/Mapping/RelationModelMapDefinition.cs
index 44dfc3bd4a..3766668582 100644
--- a/src/Umbraco.New.Cms.Infrastructure/Persistence/Mappers/RelationModelMapDefinition.cs
+++ b/src/Umbraco.Infrastructure/Mapping/RelationModelMapDefinition.cs
@@ -2,7 +2,7 @@
 using Umbraco.Cms.Core.Models;
 using Umbraco.Cms.Infrastructure.Persistence.Repositories.Implement;
 
-namespace Umbraco.New.Cms.Infrastructure.Persistence.Mappers;
+namespace Umbraco.Cms.Infrastructure.Mapping;
 
 public class RelationModelMapDefinition : IMapDefinition
 {