I had edited my own extension and added my mobile number at first. When I saw error logs that my PBX was trying to register my mobile number via my SIP trunk I removed it using my extension login via the webclient. Now whenever I to the main management of my PBX and want to change a particular extension, i.e. change the codec priority in the phone provisioning tab it stops me from saving the changes saying: Mobile number not set. Can someone point out what the solution to this is please?