Hi,
If this is a dummy object that you dont need anymore try to uncheck "indexing" from it.
SmartLog automatically gather all log servers with indexing enabled, in the background server knows which servers are up/down and when you run queries GUI will always show you all the disconnected selected servers.
to disable indexing or even remove logging and status from dummy object:
1. edit object
2. go to "Logs" section
3. uncheck "indexing"
4. go back to general section
5. go to management blades
6. uncheck "logging and statuses" blade
7. uncheck "SmartEvent" & "Correlation Unit" blades also if they are checked.
8. click OK to save changes
9. publish your changes
10. In few seconds the dummy object will not be listed as log server anymore.
11. run query while selection all available log servers
12. you will not see the yellow bar