diff --git a/src/Umbraco.Web.UI.Client/src/external/backend-api/src/index.ts b/src/Umbraco.Web.UI.Client/src/external/backend-api/src/index.ts
index 3efb987f34..26cb637132 100644
--- a/src/Umbraco.Web.UI.Client/src/external/backend-api/src/index.ts
+++ b/src/Umbraco.Web.UI.Client/src/external/backend-api/src/index.ts
@@ -284,6 +284,7 @@ export type { PagedProblemDetailsModel } from './models/PagedProblemDetailsModel
 export type { PagedRedirectUrlResponseModel } from './models/PagedRedirectUrlResponseModel';
 export type { PagedRelationItemResponseModel } from './models/PagedRelationItemResponseModel';
 export type { PagedRelationResponseModel } from './models/PagedRelationResponseModel';
+export type { PagedRelationTypeTreeItemResponseModel } from './models/PagedRelationTypeTreeItemResponseModel';
 export type { PagedSavedLogSearchResponseModel } from './models/PagedSavedLogSearchResponseModel';
 export type { PagedSearcherResponseModel } from './models/PagedSearcherResponseModel';
 export type { PagedSearchResultResponseModel } from './models/PagedSearchResultResponseModel';
@@ -321,6 +322,7 @@ export type { RelationResponseModel } from './models/RelationResponseModel';
 export type { RelationTypeBaseModel } from './models/RelationTypeBaseModel';
 export type { RelationTypeItemResponseModel } from './models/RelationTypeItemResponseModel';
 export type { RelationTypeResponseModel } from './models/RelationTypeResponseModel';
+export type { RelationTypeTreeItemResponseModel } from './models/RelationTypeTreeItemResponseModel';
 export type { RenamePartialViewRequestModel } from './models/RenamePartialViewRequestModel';
 export type { RenameScriptRequestModel } from './models/RenameScriptRequestModel';
 export type { RenameStylesheetRequestModel } from './models/RenameStylesheetRequestModel';
diff --git a/src/Umbraco.Web.UI.Client/src/external/backend-api/src/models/PagedNamedEntityTreeItemResponseModel.ts b/src/Umbraco.Web.UI.Client/src/external/backend-api/src/models/PagedNamedEntityTreeItemResponseModel.ts
index 8af4c598e0..c42a7ab504 100644
--- a/src/Umbraco.Web.UI.Client/src/external/backend-api/src/models/PagedNamedEntityTreeItemResponseModel.ts
+++ b/src/Umbraco.Web.UI.Client/src/external/backend-api/src/models/PagedNamedEntityTreeItemResponseModel.ts
@@ -9,9 +9,10 @@ import type { DocumentTypeTreeItemResponseModel } from './DocumentTypeTreeItemRe
 import type { FolderTreeItemResponseModel } from './FolderTreeItemResponseModel';
 import type { MediaTypeTreeItemResponseModel } from './MediaTypeTreeItemResponseModel';
 import type { NamedEntityTreeItemResponseModel } from './NamedEntityTreeItemResponseModel';
+import type { RelationTypeTreeItemResponseModel } from './RelationTypeTreeItemResponseModel';
 
 export type PagedNamedEntityTreeItemResponseModel = {
     total: number;
-    items: Array<(NamedEntityTreeItemResponseModel | DataTypeTreeItemResponseModel | DocumentBlueprintTreeItemResponseModel | DocumentTypeTreeItemResponseModel | FolderTreeItemResponseModel | MediaTypeTreeItemResponseModel)>;
+    items: Array<(NamedEntityTreeItemResponseModel | DataTypeTreeItemResponseModel | DocumentBlueprintTreeItemResponseModel | DocumentTypeTreeItemResponseModel | FolderTreeItemResponseModel | MediaTypeTreeItemResponseModel | RelationTypeTreeItemResponseModel)>;
 };
 
diff --git a/src/Umbraco.Web.UI.Client/src/external/backend-api/src/models/PagedRelationTypeTreeItemResponseModel.ts b/src/Umbraco.Web.UI.Client/src/external/backend-api/src/models/PagedRelationTypeTreeItemResponseModel.ts
new file mode 100644
index 0000000000..7790bc4b16
--- /dev/null
+++ b/src/Umbraco.Web.UI.Client/src/external/backend-api/src/models/PagedRelationTypeTreeItemResponseModel.ts
@@ -0,0 +1,12 @@
+/* generated using openapi-typescript-codegen -- do no edit */
+/* istanbul ignore file */
+/* tslint:disable */
+/* eslint-disable */
+
+import type { RelationTypeTreeItemResponseModel } from './RelationTypeTreeItemResponseModel';
+
+export type PagedRelationTypeTreeItemResponseModel = {
+    total: number;
+    items: Array<RelationTypeTreeItemResponseModel>;
+};
+
diff --git a/src/Umbraco.Web.UI.Client/src/external/backend-api/src/models/RelationTypeItemResponseModel.ts b/src/Umbraco.Web.UI.Client/src/external/backend-api/src/models/RelationTypeItemResponseModel.ts
index f156f0987d..1f9bcdfe1e 100644
--- a/src/Umbraco.Web.UI.Client/src/external/backend-api/src/models/RelationTypeItemResponseModel.ts
+++ b/src/Umbraco.Web.UI.Client/src/external/backend-api/src/models/RelationTypeItemResponseModel.ts
@@ -5,5 +5,7 @@
 
 import type { NamedItemResponseModelBaseModel } from './NamedItemResponseModelBaseModel';
 
-export type RelationTypeItemResponseModel = NamedItemResponseModelBaseModel;
+export type RelationTypeItemResponseModel = (NamedItemResponseModelBaseModel & {
+    isDeletable: boolean;
+});
 
diff --git a/src/Umbraco.Web.UI.Client/src/external/backend-api/src/models/RelationTypeResponseModel.ts b/src/Umbraco.Web.UI.Client/src/external/backend-api/src/models/RelationTypeResponseModel.ts
index 990febe8b7..b20537c5d0 100644
--- a/src/Umbraco.Web.UI.Client/src/external/backend-api/src/models/RelationTypeResponseModel.ts
+++ b/src/Umbraco.Web.UI.Client/src/external/backend-api/src/models/RelationTypeResponseModel.ts
@@ -9,7 +9,7 @@ export type RelationTypeResponseModel = (RelationTypeBaseModel & {
     id: string;
     alias?: string | null;
     path: string;
-    isSystemRelationType: boolean;
+    isDeletable: boolean;
     parentObjectTypeName?: string | null;
     childObjectTypeName?: string | null;
 });
diff --git a/src/Umbraco.Web.UI.Client/src/external/backend-api/src/models/RelationTypeTreeItemResponseModel.ts b/src/Umbraco.Web.UI.Client/src/external/backend-api/src/models/RelationTypeTreeItemResponseModel.ts
new file mode 100644
index 0000000000..c1c4ce7465
--- /dev/null
+++ b/src/Umbraco.Web.UI.Client/src/external/backend-api/src/models/RelationTypeTreeItemResponseModel.ts
@@ -0,0 +1,11 @@
+/* generated using openapi-typescript-codegen -- do no edit */
+/* istanbul ignore file */
+/* tslint:disable */
+/* eslint-disable */
+
+import type { NamedEntityTreeItemResponseModel } from './NamedEntityTreeItemResponseModel';
+
+export type RelationTypeTreeItemResponseModel = (NamedEntityTreeItemResponseModel & {
+    isDeletable: boolean;
+});
+
diff --git a/src/Umbraco.Web.UI.Client/src/external/backend-api/src/services/RelationTypeResource.ts b/src/Umbraco.Web.UI.Client/src/external/backend-api/src/services/RelationTypeResource.ts
index bcbb7f7c50..a3f6109d3a 100644
--- a/src/Umbraco.Web.UI.Client/src/external/backend-api/src/services/RelationTypeResource.ts
+++ b/src/Umbraco.Web.UI.Client/src/external/backend-api/src/services/RelationTypeResource.ts
@@ -3,7 +3,7 @@
 /* tslint:disable */
 /* eslint-disable */
 import type { CreateRelationTypeRequestModel } from '../models/CreateRelationTypeRequestModel';
-import type { PagedNamedEntityTreeItemResponseModel } from '../models/PagedNamedEntityTreeItemResponseModel';
+import type { PagedRelationTypeTreeItemResponseModel } from '../models/PagedRelationTypeTreeItemResponseModel';
 import type { RelationTypeItemResponseModel } from '../models/RelationTypeItemResponseModel';
 import type { RelationTypeResponseModel } from '../models/RelationTypeResponseModel';
 import type { UpdateRelationTypeRequestModel } from '../models/UpdateRelationTypeRequestModel';
@@ -130,7 +130,7 @@ export class RelationTypeResource {
     }
 
     /**
-     * @returns PagedNamedEntityTreeItemResponseModel Success
+     * @returns PagedRelationTypeTreeItemResponseModel Success
      * @throws ApiError
      */
     public static getTreeRelationTypeRoot({
@@ -139,7 +139,7 @@ export class RelationTypeResource {
     }: {
         skip?: number,
         take?: number,
-    }): CancelablePromise<PagedNamedEntityTreeItemResponseModel> {
+    }): CancelablePromise<PagedRelationTypeTreeItemResponseModel> {
         return __request(OpenAPI, {
             method: 'GET',
             url: '/umbraco/management/api/v1/tree/relation-type/root',