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 ('0e1ea8aa2c0407b469dfd14740f52ff3', -1, 1757348635, 1757348635, 'd849d8bb', -9, 0, 0)

Line : 187
File : sessions.php