Upgraded codebase leaves non FQCN in DB table

[phptek]

In a Silverstripe 3.7 --> 4.4 upgraded codebase, the "WorkflowInstance" table leaves legacy values in some columns: ClassName and TargetClass.

The logic may already deal with "ClassName" field values of "WorkflowInstance" (as opposed to its FQCN), but the workflow admin breaks with refs to "SiteTree" vs its FQCN. TO fix it, I just wrote a quick BuildTask that updates the x3 refs, but then all the "rogue" TargetClass values were all the same.