The examples show that the contact addr field in database can be `udp:192.168.0.125:5060`, but from the code seems to be concatenated prefixed with `sip:UUID@`, meaning that it can result in `sip:UUID@udp:192.168.0.125:5060`, which is invalid SIP uri. Maybe I failed to notice where conversion is done.
Then, for database updates, you have to update the xml files from `src/lib/srdbb1/schema/` and then do `make dbschema` in the root folder of Kamailio to update the sql/db creation files.