[Koha] how to solve: Patron has had overdue items and is blocked for 139 day(s).

hi all. We are using koha-3.2.1. After write off and paid fine of a patron who has overdue shows "Patron has had overdue items and is blocked for 139 day(s)" when i try to cheek out a book for that patron. Best Regard, -- Nur Ahammad Junior Assistant Librarian BRAC University, Bangladesh