Temporal join: No Union allowed

What causes this issue?

The HANA CompositeProvider contains a UNION node and at least one JOIN
node. At least one joined PartProvider is time-dependent too.
If there are time-dependent PartProviders in a JOIN node<(>,<)> it is
not possible to have a UNION node as well.
Time-dependent joins are only possible in a join-only scenario, not in a
mixed scenario.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Delete the UNION node
Switch off the time-dependency of all joined time-dependent
PartProviders (ScenarioTab, SourceTree)
InfoObjects: Hide time-dependent fields
Advanced/classic DataStore Objects, InfoCubes: Remove time-dependency

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.