Update hostname in SysLog Server when hostname file changes

I am having trouble updating the hostname cache in SysLog Server after I update the hosts.txt file.

Here is a typical example:

You can see the hostname field has an old entry. The NetBIOS name in the message field shows the current NetBIOS name.

The current host name entry in the hosts.txt file:

SysLog Server is supposed to flush address entries every 24 hours but I do not see the static cache entries update. I have cleared all entries in the DNS cache then chosen the static entries text file again but it now doesn't show any static entries in the cache view. Is there another step I need to take?