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 ('9f1f580f0af8f9609af4729084abd3ac', -1, 1713963175, 1713963175, '030fdbd9', -4, 0, 0)

Line : 187
File : sessions.php