Meh, I knew I should have fixed that in the previous release. What's happening is a player is being deleted when it checks mute_length, and the corresponding gag_length query is throwing an error. It likely also means that all permanent punishments are being removed as well. It'll be fixed in 2.1.6, which should be released in a few days. If you want a perma punishment in the mean time, probably use a really large # until the update
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