In Enterprise Global, edit the field and delete any lists, code masks,
formulas, or indicators you defined for the field. Delete the name you gave
the field. Click OK. Click OK on any warnings you get about data about to
be deleted (you'll lose any data entered in the field).
Remove the field from any views/tables (in PPro or PWA) in which it was
included.
Save Enterprise Global.
Restart PPro.