The display name format is not changing for workers after change in name format configuration

Team,

We changed the name format to have Preffered Name + Last Name i preferred name exists or this should show First Name + Last Name

The configuration is completed and we triggered the job set which would invoke 3 processes. After completion of these processes also the display name in PER_PERSON_NAMES_F TABLE is not getting changed. The changes seems to appear only PER_KEYWORD table.

Could someone please let us know if we are missing something?