[Koha] Patron has had overdue

Hi i have a strange problem i'm using koha 3.2.1 , when patron hasn't fines or overdue can't check out any books to them i get this massage * Patron has had overdue items and is blocked for 90 day(s) * Patron has had overdue items and is blocked for 11 day(s) * Patron has had overdue items and is blocked for 19 day(s) i can't using system every patron return his overdue and paid fines can't check out again .. any help