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 ('2e2fe6e1f22f3637e3b92a4f3556a541', -1, 1712925052, 1712925052, '2cc96100', 0, 0, 0)

Line : 187
File : sessions.php