[Koha] Unable to Check-In Error

Hi, Running Koha 16.11.11 / Package Installation/ Ubuntu 14.04 Desktop with MySQL. (updating from previous versions as and when the new releases are made) "Unable to Check-In" message is displayed for few patrons when trying perform checkin. Can you please help me how to fix the issue. Please find screenshots of the same here. https://ibb.co/nHf0FG https://ibb.co/mNHahw Already did dbms auto increment fix as per URL https://wiki.koha-community.org/wiki/DBMS_auto_increment_fix#The_solution With Thanks Satish MV Librarian Govt. Engineering College, Hassan Karnataka. --