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 ('c3ce47fd7c64effdade17b5383887eb8', -1, 1709235490, 1709235490, '03ef4c19', -4, 0, 0)

Line : 187
File : sessions.php