Wikimedia Bugzilla is closed!

Hi. I'm an admin on fa.wikipedia. Today, while modifying some other filters, I noticed that I can't edit abuse-filter number 4:

http://fa.wikipedia.org/wiki/%D9%88%DB%8C%DA%98%D9%87:%D9%BE%D8%A7%D9%84%D8%A7%DB%8C%D9%87_%D8%AE%D8%B1%D8%A7%D8%A8%DA%A9%D8%A7%D8%B1%DB%8C/4

The message I receive is:
"You cannot edit this filter, because it contains one or more restricted actions. Please ask a user with permission to add restricted actions to make the change for you."
(https://translatewiki.net/w/i.php?title=MediaWiki:Abusefilter-edit-restricted/fa)

I contacted a bureaucrat and he confirmed that he is not able to edit it either.

I also tried to export the filter and import it as a new one, but again I received the same warning as above.
In the end I could import the filter by disabling "Revoking auto-promoted groups" option, but that's not what I was looking for.