The configured database is not a compatible database. You are trying to access the older version of the ZENworks database

Source:  ZENworks Server Management; Server Inventory; Inventory Summary

Severity:  Informational

Possible Cause:  You are trying to access a database that is older than ZENworks for Servers 3.x.

Action:  Ensure that the configured Inventory database is of ZENworks for Servers 3.x or later.