This is change that affects several modules. But It should have no database size implications as MySQL only stores in a VARCHAR the actual used characters (plus lengths) [link](https://dev.mysql.com/doc/refman/8.0/en/storage-requirements.html#data-types...). It also should not affect backward compatibility, Kamailio 5.1.x/5.2.x should run just fine with the new table structure and vice-versa.