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 ('20e18fd11f1322fd1c26d8a4f096f300', -1, 1713248981, 1713248981, '0391177b', -9, 0, 0)

Line : 187
File : sessions.php