Delete Dashboard

We have upload Vmware dashboard to our Grafana server.(
when we are in view VMware for VM and try to delete one panel from a specific virtual server and reload the page it came back. yes we have save after we delte the panel.

if we try to create and put a new panel to a specific virtual server and save it and reload the page. the new panel is remove from virtual server.

if we try to remove a raw with virtul server and 10 panel save and reload the page that server is back agin.

i hope someone understand what i mean and can help me what is wrong and why i cant remove or create new panel and when i reload the page it is that i want it and not go back to default.

Best regard