If true, then two models will be considered versions of one another only if they have the same model name and the same class name.

If false, two models are considered versions of one another if they have the same model name, independent of their class name.

Suppose you have the following models in your database:

When this tag is true, Creo Elements/Direct Model Manager/Creo Elements/Direct Drawing Manager does not treat these models as versions of each other. When the tag is false, Creo Elements/Direct Model Manager/Creo Elements/Direct Drawing Manager treats them as versions of one another, which may cause random results when trying to evaluate the highest version.