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 ('bdde86a4c1a5b3b4f052d3e0b5ff3414', -1, 1714030483, 1714030483, '0390549b', -4, 0, 0)

Line : 187
File : sessions.php