Thank you guys!!
I'm trying recover my forum after smbd hacked it and looks like this smbd had an access to DataBase directly. I've found some extra users with founder rights (=3) and with permissions = 2 (like bots). So first I've removed all those users directly from DB and than figured out, that forum does not work after it. I've recovered it again, gave permission 0 to all extra users and removed all bot's just in case, but forum was not working after it also. So thank's, you've explained, I should not remove them directly from DB.
WIll I have any problems if I give permission 0 to all bots directly in DB (after further recover)? ..just blowing on the water