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 ('4324f6c278e020d21122374fba9b1cbc', -1, 1714004221, 1714004221, '2cc961e0', -1, 0, 0)

Line : 187
File : sessions.php