-- Reverts migration 021 -- "assign to a user" turned out to mean picking
-- from the existing Creator tags already used on Claim Links (plain text,
-- no id of their own), not a formal Creator Group. The manual Claimed-by
-- picker uses claimed_by_note for that instead (a dropdown of distinct
-- creator_tag values pre-fills it); this column was never actually relied
-- on by any real data, only briefly by this same in-progress feature.

ALTER TABLE `keys` DROP FOREIGN KEY fk_key_claimed_by_creator_group;
ALTER TABLE `keys` DROP COLUMN claimed_by_creator_group_id;
