Provisioning '%1': One or more of the databases already contains schema. When editing or creating a Project Server instance, ...

Provisioning '%1': One or more of the databases already contains schema. When editing or creating a Project Server instance, you may specify:
* Four databases that do not exist
* Four existing, blank databases
* Four existing Project Server databases of the same version from the same installation.
Combinations of blank, new, and existing databases are not allowed.