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 ('6a91c01d6b5b68c5db5d992c5aa43bea', -1, 1713508940, 1713508940, '12bdc1ac', -1, 0, 0)

Line : 187
File : sessions.php