When attempting to disable filter 920 on the English Wikipedia, an internal error is triggered 100% of the time.
Actual message:
MediaWiki internal error.
Original exception: [W8tYdQpAMEwAAJhoII0AAAAR] 2018-10-20 16:31:49: Fatal exception of type "Wikimedia\Rdbms\DBQueryError"
Exception caught inside exception handler.
Set $wgShowExceptionDetails = true; at the bottom of LocalSettings.php to show detailed debugging information.