We already have released one unlocked package in production for six months, without namespaces. We are considering developing new unlocked packages, and we were thinking about using namespaces and maybe converting the previous one to add a namespace:
Is it possible simply to bring all the data from the non-namespaced fields to the namespaced fields?
Will the API name of fields need to reference the namespace from within the package (a validation rule, for example?)
Will the API name of fields need to reference the namespace from outside the package (an API call for an integraiton, for example?)