XG125 : impossible to delete or disable default rune name "null"

I have the same issue but on virtualized appliance. There is one firewall rule with name “NULL” and ID 1 that is not possible to rename, to modify, to disable or to delete.

I cannot remember exactly what firmware version it was when the rule was getting created. But as it is ID 1 it must be one that was getting auto generated at the beginning during set-up. It is a LAN to WAN rule and so far, it was fine for me. All firmware updates I installed did not change the fact that the rule is not possible to edit. This still is the case in SFOS 16.05.7 MR-7.

When I export the settings, I can see in chapter <SecurityPolicy> that this one rule has no name. Instead of <Name>xxxx</Name> there only is </Name> in the line.
I also tried to edit manually the exported xml file and import again. But this only is adding a new rule and does not change the broken rule.

What can I do?

Any way to rename the rule via CLI or by editing any config file directly OS level?
Or any way to edit the backup file?

Meanwhile I figured out by myself how to fix it.

I changed the name in SQL database directly via command line interface.

Sophos XG console
--> 5 device managmeent
--> 3 Advanced shell

psql -U nobody -d corporate

UPDATE tblfirewallrule
SET name = 'new_name'
WHERE
name IS NULL;

\q

This might be not the most elegant way how to use SQL command but it worked as there only was one rule with empty name (NULL).

Meanwhile I figured out by myself how to fix it.

I changed the name in SQL database directly via command line interface.

Sophos XG console
--> 5 device managmeent
--> 3 Advanced shell

psql -U nobody -d corporate

UPDATE tblfirewallrule
SET name = 'new_name'
WHERE
name IS NULL;

\q

This might be not the most elegant way how to use SQL command but it worked as there only was one rule with empty name (NULL).