Migrating tactical assertion RemoteCacheAssertion with GMU ended up with the following error:
GENERIC dependency error: Cannot replace dependency of type 'GenericEntity'. Unable to load concrete entity class: Cannot find generic entity manager for class: com.l7tech.external.assertions.remotecacheassertion.RemoteCacheEntity
All supported versions of Gateway
The RemoteCacheAssertion server module file was missing on the target gateway and hence it resulted in the missing class error.
Before using GMU migrateIn command, make sure any/all tactical assertion server module files are present in the gateway server.