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 ('d3fb55431470e84c6d810f34f012e0a3', -1, 1711718410, 1711718410, '2cdf2589', -4, 0, 0)

Line : 172
File : sessions.php