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 ('a89ab78bc69bad942cf9ef58cf36a7e8', -1, 1730418518, 1730418518, '12dbb2a6', -1280, 0, 0)

Line : 195
File : sessions.php