Ubiquity - firewall policy modify overwrite rule after update

HI,

Im currently running cloud key gen 2 with multiply site on him. Each site has his own USG pro 4 port. I’m runnging vpn site to site to central site and use one part of custom config for rerouting traffic back to central site.

set firewall source-validation disable
set firewall modify VPN_Gateway rule 2501 description VPN_Gateway
set firewall modify VPN_Gateway rule 2501 action modify
set firewall modify VPN_Gateway rule 2501 modify table 2
set firewall modify VPN_Gateway rule 2501 source address xxx.xxx.xxx.0/24
set firewall modify VPN_Gateway rule 2501 protocol all
set protocols static table 2 interface-route 0.0.0.0/0 next-hop-interface vti64
set interfaces ethernet eth0 firewall in modify VPN_Gateway

but when i update the USG the rule is gone no more present in config. how to fix it or hard code it that the rule is always present on the devices.

tnx in advance.