Spec Browser Error

The specs for a project work fine, but whenever any user tries to go into Spec Browser it gives me an error message saying:

"APSpecEng: This key is already associated with an element of this collection"

Why am I getting this error and how can I get rid of it so Spec Browser works properly.  It only happens in this one project which I reccently pulled from a different site, upgraded to XM, and integrated with Projectwise.  All related product info is below:

Plant Framework 8.9.4.47
Plant Design 8.9.3.30 w .49 SP2 update
Projectwise 8.9.4.89