I'm trying to create a new field, but Drupal came up with the well-known error:
The machine-readable name is already in use. It must be unique
I'm sure that the field doesn't exist anymore (I checked the fields' list and it doesn't show up).
I want to use that specific machine name because I already have developed some functions that are using that name.
So I guess the name is still saved in the database, there is a way to delete it without screw everything up?
I have used this answer to manually delete the field from the database and it worked!