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 ('011c51690330ccc2abf3f38697e9e058', -1, 1728962258, 1728962258, '23ad3012', -1, 0, 0)

Line : 172
File : sessions.php