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 ('a438e6d0a7204a058b5dc7564891228c', -1, 1714033305, 1714033305, '030fd36b', -4, 0, 0)

Line : 187
File : sessions.php