can not update Firewall Rule

Which version are you using? Sounds like a database issue. One of your Objects in this rule seems to be broken.

If you clone this rule, does it work? 

hi LuCar,

thanks for the response,

I tried to clone it but  I got the same issue (Firewall rule "Clone_FullyAlowedUsers" Could not be added).

Firmware version: SFOS 18.0.1 MR-1-Build396

Same problem here today

Cannot update Firewall rule, cannot clone the rule either

XG310 (SFOS 18.0.1 MR-1-Build396)

Recreated the problem rule from scratch and it's functioning ok

last thing I did with this rule was to move it up in the rule order, maybe this is how it got corrupted?

I removed the rule and recreated the rule with the same properties and it worked.

thanks for your cooperation,

Sometimes such rules are defect / broken in the backend. Very rare issue. Recreating / cloning solving this issue most likely. 

Otherwise you would need to dig into the Logs to find the actual root cause.