How to fix an active address site does not show on Supplier Address Book?

We did a supplier merge.
After merge job is completed, supplier A is merged to supplier B,
however, we found an active site doesn't show in the new Supplier B’s Address
Book.  In the supplier Quick update page,
we can see the site list as active.  What
should we do to be  able seeing this site
in the supplier B’s Address Book page?