Rip crew rank 8000. But good thing my real rank 5391 on my second accountLol...
Modded account problems.
I assume that it went to a negative rank because you had hit the maximum rank possible then continued to gain RP on that account.
If you continue to gain RP on that account the same thing will continue to happen e.g. the next crew rank will be -2 and so on.
What you should do is start a new crew just for that account.
It will start you back at zero but you can just go AFK for awhile in a Capture and then within a few hours have all of the Crew perks unlocked.
I don’t think that you can fix it in your current crew as it will continue to go negative.
It’s like an old school video game when we would beat the highest score possible the on screen score would roll back to zero.
With this it helps going but is going to negative value rather than starting back at zero.