How to Remove Source on Firestick

I can easily remove a source from the SERVER SETTINGS page.

But, how can I remove the source from my Firestick?

If I go to MANAGE SOURCES, an old source(s) are still there. I can refresh and of course now get zero channels, but I do I just remove it?

As long as the source is accessible on the network you cannot remove it. You can enable / disable.

The source is not available on the network.
Directv Stream - removed from admin page and no longer avail, but shows on Firestick client
SlingTV - same

so, not solved

You can clear the data on the Channels DVR APP.

When I go to admin settings on server PC, the source in question is not there to delete.
I opened up the app on my iphone, and those sources were not there either.

But - they still existed on the Firestick.

Closed the app on Firestick and reopened. Still there.

SOLVED - restarted Firestick and they went away.