phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('7fe4c2c1879071ddf3422d641f1386f8', -1, 1713859651, 1713859651, '12742ad0', -10, 0, 0)

Line : 187
File : sessions.php