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 ('7988beb80c09ff48f3ea8a61bd1f2c9d', -1, 1713999538, 1713999538, '03912ffd', 3, 0, 0)

Line : 187
File : sessions.php