ProjectDatabase is a package in Pipeline Pilot. ProjectDatabase package was part of Insight application and it was made as a separate ProjectDatabase package effective with the 2019 release. The projectdb package is only installed if you have a license for scitegic_insight or a standalone scitegic_projectdb license feature. 

The policy file PP90 located in the 'Install Drive:\Program Files\BIOVIA\PPS\licensing\share\policies' folder contains information on the scitegic_projectdb.

Projectdb is only applicable in the context of Insight or Registration+Insight.  

If the policy file PP90 has scitegic_projectdb listed, it is installed on the server. But, if the license file does not contain license for projectdb, it shows invalid under 'Reports > Foundation Applications' in Pipeline Pilot. If you don’t have Insight running on the server, then you don’t need projectdatabase. You can remove it from 'Admin and Settings > Applications' in BIOVIA HUB.