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 ('becba606f3d7b0eadd0c57d5ee5b5e02', -1, 1711698486, 1711698486, '03ec8afd', -4, 0, 0)

Line : 187
File : sessions.php