SIP Unregistered

Hi,
While changing the FREE PBX configuration via GUI and applying it 4-5 times makes the SIP trunks go unregistered.

My Current Asterisk Version: 11.21.2
FreePBX 13.0.70
PBX Firmware:10.13.66-1
PBX Service Pack:1.0.0.0

Anyone had hands on this issue ?

Regards,
Mohammad