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 ('8cba248f8427f3636f2910ee1ab55c31', -1, 1713508845, 1713508845, '03919ab2', 3, 0, 0)

Line : 187
File : sessions.php