Reported on Persian Wikipedia while moving "تهماسپ یکم" (Have been tried by several people).
Failed to delete page-move revision: <OK, collected 1 error(s) on the way, no value set> +------+---------------------------+------------------------------------------+ | 1 | cannotdelete | تهماسب یکم | +------+---------------------------+------------------------------------------+ t exception.trace #0 /srv/mediawiki/php-1.33.0-wmf.13/includes/MovePage.php(263): MovePage->moveToInternal(User, Title, string, boolean, array) #1 /srv/mediawiki/php-1.33.0-wmf.13/includes/specials/SpecialMovepage.php(608): MovePage->move(User, string, boolean) #2 /srv/mediawiki/php-1.33.0-wmf.13/includes/specials/SpecialMovepage.php(128): MovePageForm->doSubmit() #3 /srv/mediawiki/php-1.33.0-wmf.13/includes/specialpage/SpecialPage.php(569): MovePageForm->execute(NULL) #4 /srv/mediawiki/php-1.33.0-wmf.13/includes/specialpage/SpecialPageFactory.php(558): SpecialPage->run(NULL) #5 /srv/mediawiki/php-1.33.0-wmf.13/includes/MediaWiki.php(288): MediaWiki\Special\SpecialPageFactory->executePath(Title, RequestContext) #6 /srv/mediawiki/php-1.33.0-wmf.13/includes/MediaWiki.php(862): MediaWiki->performRequest() #7 /srv/mediawiki/php-1.33.0-wmf.13/includes/MediaWiki.php(517): MediaWiki->main() #8 /srv/mediawiki/php-1.33.0-wmf.13/index.php(42): MediaWiki->run() #9 /srv/mediawiki/w/index.php(3): include(string) #10 {main}
Maybe caused by T20493: RFC: Unify the various deletion systems (Not sure if anything happened on that part)