Edit Route not possible

SW2016 Routing

I have a very simple route from one fitting to another. I replase one fitting and get error.

Then select edit route and connect route to this new fitting. Looks fine. Then click ok and accept.

Now the route is no more editable. Sometimes I lose my tube and can't get it back.

Looks like you can't change route end point fittings. Am I right?

SolidworksRouting