Missing SupportedReference relation to route leg.
There is a support on a route and the relation between that support and the route leg is missing.
There is a support with missing leg relation or an incorrect supported relation with the branchPathFeat.
The software will not be able to update the support if the route changes.
What You Should Do
Repair these objects by running the Database > Clean Database command in Project Management.
You can also manually update the support:
Open session file.
Go to the route where the relation is missing with the support.
Move the route or connect the support to other supported object, which would recompute the support and the relations would be updated.