Dear mikrotik expert person I have RB1100AHX4 dude edation ARM

I getting this error

simultaneous session limit reached

Pleaee see the attach file

userman database crashed. I could not ... failed to add session. attempt to write readonly database
Mikrotik RB1100AHX4 dude edation ARM V6.44

Pleaee help how to fix this issue i lost all my users too

Dear Sir/Madam I bought mikrotik RB1100AHX4 dude edation ARM V6.44 I configure hotspot with user manager I have done all user manager configuration and I add 100 users too,but now userman database crashed. I could not ... failed to add session. attempt to write readonly database Pleaee to fix this i...

I have bought new RB1100AHX4 dude edation Arm. I configure hotspot user managar but it userman database crashed. I could not ... failed to add session. attempt to write readonly database how to fix it