title: prom-client metrics returning negative value on prometheus
body: <p>I am running the prom-client query &quot;http_request_duration_ms_sum&quot; on prometheus, everytime I run this query it return's a negative value.</p>
  <p>eg:- http_request_duration_ms_sum{code=&quot;200&quot;, instance=&quot;x.x.x.x&quot;, job=&quot;node_exporter&quot;, method=&quot;get&quot;, route=&quot;/v1/api&quot;}   -9</p>
  <p>Not sure why I am getting negative value while running this metrics. Whereas when I run &quot;http_request_duration_ms_count&quot;, I get a positive count of value. Is there any way to fix this or what might be causing it to give negative value.</p>