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 ('c2acc61610330e2eb5322f72366780bd', -1, 1754793334, 1754793334, 'd849d8fd', 3, 0, 0)

Line : 189
File : sessions.php