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 ('f20ba6ebe6ef5f93c297e75c9f8734c4', -1, 1713556526, 1713556526, '12741869', 7, 0, 0)

Line : 187
File : sessions.php