vim /var/www/html/modules/extensions_batch/libs/paloSantoExtensionsBatch.class.php
Search "INSERT INTO incoming", insert mohclass and default like that:
$sql = 'INSERT INTO incoming (cidnum, extension, description, destination, '.
'privacyman, alertinfo, ringing, grppre, delay_answer, '.
'pricid, pmmaxretries, pmminlength, mohclass) '.
'VALUES ("", ?, ?, ?, 0, "", "", "", 0, "", "", "","default")';