Embedded DBMS definitions vs. maintained in repository

PowerDesigner 16.5 SP05 PL02

We have about a dozen models and several dozen users, most of whom access the models through PowerDesigner Viewer.

We use a custom DBMS definition for SQL Server.  It is embedded in all of the models.  However, from time to time, when models are checked out the embedded DBMS defintion appears missing (the select DBMS dialog pops up) and has to be reloaded.

I noticed the DBMS definition can be versioned in the repository separately via the Tools->Resources->DBMS screen.  Is it possible to have each model version point to a specific version of DBMS definition stored in the repository somehow to avoid the issue with missing embedded DBMS definitions?

Thanks!