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 ('08401af2e6dbf4047851322411ad13f2', -1, 1730420124, 1730420124, '12bf8bf5', -9, 0, 0)

Line : 195
File : sessions.php