We introduced that as a new variant type, because in the past, when a variant was created, it might have no variant type specified, and that led to some undesirable results. (The problems were worse with complex forms than with variants--there are some very puzzling results for complex forms with a missing type.)
This new type was introduced as a real variant type, meaning it shows up in the Lists area in Variant Types, and it is one of the options when you click on the ellipsis that allows you to choose what type a specific variant is. In theory, you should be able to open that dialog and untick "Unspecified Variant". (It happens to be coming at the top of the list, which is not in alphabetical order, so that might make it harder to find.)
I hope that is all that you need to solve this problem. However, we are aware of some places where it is showing up even if that box is not ticked. That is definitely a bug. I am most aware of this issue in the Reversal Index--I didn't think it was happening in the main dictionary. The problems with variant types and complex form types in the Reversal are one of our highest priorities to fix for the Beta 2. If there are also problems in the main dictionary, that will be right up there in priority, if we have a clear understanding of the problem.
I may need more specific details about your situation, and it may be helpful to send your project to
FLEx_...@sil.org, with a mention of specific entries that are showing the problem.
-Beth