FRBR/Dedup keys need to be rebuilt. FRBR and Dedup keys are built at record creation and/or migration. Editing a bib record, re-indexing a bib using the "Recalculate Local Resource Types" job, or the semi-annual re-indexing process don't rebulid the keys. The keys must be rebuilt either by filing a case with FLVC or by accessing the button to "Recalculate FRBR and Dedup groups" in Configuration > Discovery > Other > Dedup and FRBR Test Utility. The button is grayed out until an MMS ID is entered and keys are checked.