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 ('9c8a28883373b7816a2d4773b7214226', -1, 1730415669, 1730415669, '12e04300', -1280, 0, 0)

Line : 195
File : sessions.php