message control

Dear Experts,

when i am trying to chage in msg control for customer marked for delation msg no-131 in t- code OBA5 from information to error,

but there is no error or warning msg in F4 selectoin there is only informaion I and switch of msg - are showing.

could you please infrom where we maintain these msg types to appear in F4 selection in T.code -OBA5.

Thanks & Regards,

Prasad.