no idea what it means or does (something about a amethyst dupe fix), but I thought reporting this as it sounds game breaking and no idea if this fix is still needed or if it is fixed by charm itself by now

here is the uploaded log (note that only fabric api, charm & fabrication are loaded and the other mods are disabled)
https://mclo.gs/oHkTBNI

EDIT: for now I've banned that setting, but still interested if this needs a fix

Duplicate of #495

so it's been fixed just not released yet

"fixed by charm itself by now"

Charm#639 was closed with no comment.
to my knowladge charm has still made no changes to fix the dupe

Just checked the current Charm code; they have not fixed the dupe.

I'll release a pre6 in a bit with the fix.