diff --git a/apps/server/src/models/base/base.tree.service.ts b/apps/server/src/models/base/base.tree.service.ts
index f62aecc..aa0e643 100755
--- a/apps/server/src/models/base/base.tree.service.ts
+++ b/apps/server/src/models/base/base.tree.service.ts
@@ -139,7 +139,7 @@ export class BaseTreeService<
 
       const result: any = await super.update(anyArgs, { tx: transaction });
 
-      if (anyArgs.data.parentId !== current.parentId) {
+      if (anyArgs.data.parentId && anyArgs.data.parentId !== current.parentId) {
         await transaction[this.ancestryType].deleteMany({
           where: { descendantId: result.id },
         });