Steps to reproduce:

1. Add the PostgreSQL by Agent2 template for a host
2. Go to Latest data and observe some of the Bgwriter dependent items being unsupported with a wrong error message

Result:
See screenshots
Expected:
Items being unsupported, but with the correct error message.

Error message states that we are using the wrong connection details, however this is not the case as the other items are indeed collecting data.

The master items (Get bgwriter) is properly collecting data.

Reason for these items being unsupported is likely because the data it's looking for is not present in the master data.