-- 移除水印相关字段
ALTER TABLE template DROP COLUMN watermark_enabled;
ALTER TABLE template_download_log DROP COLUMN watermark_text;

-- 删除之前新增的 template.watermark.download 权限
DELETE FROM role_permission WHERE permission_id IN (SELECT id FROM permission WHERE permission_code = 'template.watermark.download');
DELETE FROM permission WHERE permission_code = 'template.watermark.download';