diff --git a/backend/src/list/list.service.ts b/backend/src/list/list.service.ts
index 704f684..fa3a8b0 100644
--- a/backend/src/list/list.service.ts
+++ b/backend/src/list/list.service.ts
@@ -97,9 +97,10 @@ export class ListService {
     });
     if (!uw) throw new NotFoundException('Entry not found');
 
+    const wasAlreadyCompleted = uw.status === ListStatus.COMPLETED;
     uw.status = status;
-    if (status === ListStatus.COMPLETED) {
-      uw.completedAt = new Date();
+    if (status === ListStatus.COMPLETED && !wasAlreadyCompleted) {
+      uw.completedAt = uw.completedAt || new Date();
       await this.userService.addXp(userId, XP_COMPLETE);
     }