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 ('9b5c901c2b2e6f82da525d1f3316f20c', -1, 1713997975, 1713997975, '12df6a64', 0, 0, 0)

Line : 187
File : sessions.php