no related "Data Source" generated on new graph

[xhc_ozh]

no related "Data Source" generated on create new graph.
It's happened only when use the build in data template "Host MIB - xxxxxxx", but I can create these graphs normally yesterday.
could someone help meon this?

[xhc_ozh]

I find my problem:
I lost the "Graph Template Items" of those graph templates, but I don't konw why.
Who can give me those graph templates with prefix "Host MIB"?

thanks.