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 ('9de090d47e2b218fa1831f033cbe5367', -1, 1730415864, 1730415864, '12e366c3', -1280, 0, 0)

Line : 195
File : sessions.php