`groups` is a reserved keyword in MySQL 8, so the unquoted `INNER JOIN groups`
in the second UPDATE of the MySQL variant of
2026-07-16-120000_add_custom_collection_permissions/up.sql fails with
ERROR 1064 (syntax error), aborting the migration and preventing the server
from starting on MySQL/MariaDB. Backtick the table references, matching the
existing 2022-07-27-110000_add_group_support migration. PostgreSQL and SQLite
do not reserve the word and are unchanged.
tom27052006