The Austronesian Comparative Dictionary

Loans: admit fault, confess

Probably a language__Tagalog loan distribution.

WMP
Casiguran Dumagat amín to admit fault
Ilokano amín to confess one’s guilt or error; admit defeat, concede
Tagalog um-amín to own up; to confess
Agutaynen mag-amin to admit to doing something; to confess a wrong or sin