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 ('9c6543d2c4bb777ed13d6c899d6f06ab', -1, 1713310616, 1713310616, '12bfe458', -10, 0, 0)

Line : 187
File : sessions.php