phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1406 Data too long for column 'session_admin' at row 1

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('a3e110e79d53f33f651201a325eac0ec', -1, 1638900356, 1638900356, '3650add9', 12, 0, 0)

Line : 172
File : sessions.php