Renaming a snippet retains original snippet name/content and prevents deletion

[sirugh]

I discovered what I think is a pretty bad bug. If you rename a snippet, you are unable to ever delete the original. It is possible I missed something, but this is what I am seeing. I was only able to work around this by upping the priority of the remaining snippets so that it never hits the original

This is the output of my generated VCL after:

1. Creating a "backendroutesfetch" snippet with priority 30
2. Renaming that snippet to "snippetfetch".
3. Changing that snippet to priority 29

# Snippet magentomodule_snippetfetch : 29
if (!req.http.x-commerce) {
    unset beresp.http.Set-Cookie;
    return(deliver);
}

# Snippet magentomodule_backendroutesfetch : 30
if (!req.http.x-commerce) {
    unset beresp.http.Set-Cookie;
    return(deliver);
}

I am unable to delete the "backendroutesfetch" snippet (it doesn't exist in the Magento Admin UI).
I am unable to rename the snippet BACK to the original (it says it already exists)
I am unable to create a new snippet with the name "backendroutesfetch" (I get an error like "backendroutesfetch" already exists").

[sirugh]

Possible workaround: You can delete the snippet from var/vcl_snippets_custom/ folder on the environment and then the next time you publish VCL changes it will not be pushed.