Instance disapear when server is down

I have a table with instances that represent my servers (on the left) and the data in “overview” view, when one of my servers is down, the line where my instance is located disappears, but I would like these lines are fixed and that if there is no data simply put an “error”, how to do so that the line of a down server does not disappear? I am using prometheus queries in this array

Thank you !

when the server is down

when the server is up


What is your datasource and version of grafana



my grafana version is v9.4.7

i use a merge to organise my values