argoCD integrated with github repo

When the customer is trying to delete a template from the GitHub repository, it shows deleted. But whenever they sync, the following error[1] is displayed at argoCD dashboard. PFA

I am working with openshift-gitops to sync my configuration git repositories to namespaces.
When I add a yaml resource of apiVersio*n template.openshift.io/v1* and kind Template, ArgoCD can create this template object in the namespaces.

But when I delete that yaml resource from the git repository, ArgoCD cannot prune this object from the namespace and it gives the errors[1] as shown below.
The yaml resource I added to the git repository is in the case attachments.
[1] "the server could not find the requested resource"
I still want to work with Template resources and it would be nice to manage them with ArgoCD.