can't rename card on patt lang Wagn+example
Trying to rename http://grouppatternlanguage.org/wagn/Going_Meta to "Go Meta". Hoptoad says:
ActiveRecord::StatementInvalid: PGError: ERROR: duplicate key value violates unique constraint "cards_key_uniq" : UPDATE "cards" SET name=E'Go Meta+discussion', "key"=E'go_metum+discussion' WHERE (id = 4093) and ActiveRecord::StatementInvalid: PGError: ERROR: duplicate key value violates unique constraint "cards_key_uniq" : INSERT INTO "cards" ("name", "reader_type", "indexed_content", "updated_at", "appender_id", "current_revision_id", "created_by", "references_