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 ('2568f5df41175801c61dc6c8f30d325b', -1, 1713503988, 1713503988, '0389b420', -7, 0, 0)

Line : 187
File : sessions.php