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 ('dcd4364554f3e2ce2e8d705a9d53e161', -1, 1714037541, 1714037541, '1275ba5c', 4, 0, 0)

Line : 187
File : sessions.php