From f8e78792b8946e72c1456224e86bb30db9640b71 Mon Sep 17 00:00:00 2001
From: Daniel Dietzler <36593685+danieldietzler@users.noreply.github.com>
Date: Tue, 7 Jul 2026 18:21:27 +0200
Subject: [PATCH] fix: oauth account linking (#29624)

---
 server/src/services/auth.service.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/server/src/services/auth.service.ts b/server/src/services/auth.service.ts
index 532325273..6cfc60d58 100644
--- a/server/src/services/auth.service.ts
+++ b/server/src/services/auth.service.ts
@@ -426,7 +426,7 @@ export class AuthService extends BaseService {
       throw new BadRequestException('This OAuth account has already been linked to another user.');
     }
 
-    if (auth.session) {
+    if (auth.session && sid) {
       await this.sessionRepository.update(auth.session.id, { oauthSid: sid });
     }