diff --git a/src/junior/services/junior.service.ts b/src/junior/services/junior.service.ts
index b85e716..fdc7e58 100644
--- a/src/junior/services/junior.service.ts
+++ b/src/junior/services/junior.service.ts
@@ -114,7 +114,28 @@ export class JuniorService {
       }
       junior.customer.user.email = body.email;
     }
-    setIf(user, 'profilePictureId', body.profilePictureId);
+    // Update profile picture: ensure FK and relation are consistent to avoid TypeORM overriding the FK
+    if (typeof body.profilePictureId !== 'undefined') {
+      if (body.profilePictureId) {
+        const document = await this.documentService.findDocumentById(body.profilePictureId);
+        if (!document) {
+          this.logger.error(`Document with id ${body.profilePictureId} not found`);
+          throw new BadRequestException('DOCUMENT.NOT_FOUND');
+        }
+        if (document.createdById !== juniorId) {
+          this.logger.error(
+            `Document with id ${body.profilePictureId} does not belong to user ${juniorId}`,
+          );
+        }
+        user.profilePictureId = body.profilePictureId;
+        // assign relation to keep it consistent with FK during save
+        user.profilePicture = document as any;
+      } else {
+        // if empty string provided (unlikely), clear relation and FK
+        user.profilePicture = null as any;
+        user.profilePictureId = null as any;
+      }
+    }
     setIf(user, 'firstName', body.firstName);
     setIf(user, 'lastName', body.lastName);