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 ('144208d6203a04647e98c47304831686', -1, 1730416990, 1730416990, '340f5882', -9, 0, 0)

Line : 195
File : sessions.php