Tables with encryption=yes using file_key_management plugin are not encrypted

Effect file_key_management_plugin where first tables with key_id 1-4 are created, then key_id is changed in all tables to 5. Restart server with different key file where keys 1-4 are deleted and new key_id 6-9 are introduced but naturally key 5 remains the same. Idea is to alter tables back to use changed keys for key_ids 6-9.