Respond to CR.

Signal/src/util/Backup/OWSBackupImportJob.m

@@ -187,8 +187,9 @@ NSString *const kOWSBackup_ImportDatabaseKeySpec = @"kOWSBackup_ImportDatabaseKe
             [OWSBackup.sharedManager setIsBackupEnabled:YES];
         })
         .thenInBackground(^{
-            [[self.tsAccountManager updateAccountAttributes] retainUntilComplete];
+            return [self.tsAccountManager updateAccountAttributes];
-
+        })
+        .thenInBackground(^{
             [self succeed];
         });
 }