Customized our Portfolio Item Types, but the change is not reflecting on the Portfolio Items themselves.
Change "Feature" to "Epic" and Updated its ID Prefix from "F" to "E"
After saving all the Epics still show an "F" as their ID Prefix
If you edit the item it will update the ID Prefix. To make the change to a large number of items you can use the bulk edit to make a minor change such as Color, and then change it back again if needed.