-XDB::execute("DELETE FROM watch_profile
- WHERE ts < DATE_SUB(CURRENT_DATE, INTERVAL 15 DAY)");
+XDB::execute("UPDATE watch_profile
+ SET ts = NOW()
+ WHERE field = 'broken'");
+XDB::execute('DELETE FROM watch_profile
+ WHERE ts < DATE_SUB(CURRENT_DATE, INTERVAL 15 DAY)');