List of values in Core HR are blank after updating common lookups

Hello,

We have renamed meaning of one lookup which we are using on assignment page for DFF. After rename of meaning, values which are renamed are coming as blank on assignment page.

e.g. Meaning earlier was "ABC" and it was stored and displayed as "ABC" on employees assignment page. Assume it is now renamed as "DEF", these employees DFF field on assignment page now showing blank however when I try to edit/correct assignment, it shows me newly updated "DEF" in list of values.