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 ('d806385871ea930bbf76f7a5e67d2200', -1, 1638903916, 1638903916, '3650add9', -11, 0, 0)

Line : 172
File : sessions.php