This is just an information:
Please recognize that on Commons, when this error is detected in UpWiz, a button allowing to post an "undeletion request" is added. This bug is just for your information. You can mark as fixed as soon as the persons responsible have read it. A feature request for easier integration of "community tools" (sorry this is an illusion, there are only a few who write JS and even fewer who are experienced) will be filled.