db-schema/db_scripts/diff/15314.up

USE prosody;
SET autocommit=0;

ALTER TABLE `sipwise_mam` charset=utf8mb4, MODIFY COLUMN `stanza` TEXT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
ALTER TABLE `sipwise_offline` charset=utf8mb4, MODIFY COLUMN `stanza` TEXT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;

COMMIT;