I created a custom field called "Personal Data", added all the necessary fields, in the settings tab and added the information "cf_" in the "Field ID prefix" field, after that I created several records with the custom field. After a few days I needed to create a new field called "Artistic Experiences", the moment I updated the structure the information that was in the field: Field ID prefix" disappeared and whenever I added "cf_" and updated the structure the "cf_" information disappeared .
I tested in several ways and was unsuccessful, as a solution I added the "cf_" information to all fields individually.
With this report I come to ask if it is a bug in MetaBox or an error I made.
The following structure was created:
https://pastebin.com/UF53ngpM