diff --git a/app/api/controller/pullreq/branch_change_target.go b/app/api/controller/pullreq/branch_change_target.go
index a83fbd80d..abbbad82c 100644
--- a/app/api/controller/pullreq/branch_change_target.go
+++ b/app/api/controller/pullreq/branch_change_target.go
@@ -89,7 +89,7 @@ func (c *Controller) ChangeTargetBranch(ctx context.Context,
 	oldTargetBranch := pr.TargetBranch
 	oldMergeBaseSHA := pr.MergeBaseSHA
 
-	_, err = c.pullreqStore.UpdateOptLock(ctx, pr, func(pr *types.PullReq) error {
+	pr, err = c.pullreqStore.UpdateOptLock(ctx, pr, func(pr *types.PullReq) error {
 		// clear merge and stats related fields
 		pr.MergeSHA = nil
 		pr.MergeTargetSHA = nil