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 ('afd74b8ab405f5ca55c2b7338d5d0660', -1, 1714139889, 1714139889, '12755b99', -10, 0, 0)

Line : 187
File : sessions.php