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 ('a223c6eb178100f80ce4ce5597c1c5ba', -1, 1730418307, 1730418307, '03915d91', -9, 0, 0)

Line : 195
File : sessions.php