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 ('671440c40b0d22a7b1006be4b4a5bbfd', -1, 1713972920, 1713972920, '03886140', -10, 0, 0)

Line : 187
File : sessions.php