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 ('b0fd8c585c880a96b895e927822d8e88', -1, 1715303388, 1715303388, '12dcb2cf', 15, 0, 0)

Line : 172
File : sessions.php