In Strategy 2019 Update 1 and Update 2, importing a package with a missing dependency into Object Manager does not cause an error message to appear. Instead, it says the import was successful.

However, when you run the package, an error appears because there is a metadata inconsistency.

This is an identified defect in Object Manager.
This issue is resolved in Strategy 2019 Update 3. Upgrade to Strategy 2019 Update 3 or later to take advantage of the fix.
To resolve the error on Strategy 2019 Update 2, perform the following steps on the machine where Object Manager is installed.
If the machine with Object Manager has the Intelligence Server installed:

If the machine with Object Manager does not have the Intelligence Server installed:

KB483333