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 ('9be2e48775997544f14453dd121476d0', -1, 1713502809, 1713502809, '12dd5521', -10, 0, 0)

Line : 187
File : sessions.php