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 ('7f5627dca9cb0b90dd54ef2b1376587e', -1, 1713504648, 1713504648, '039342b2', -8, 0, 0)

Line : 187
File : sessions.php