Hi,
I would like to bring an important point of reflection:
In the ODK-CENTRAL interface, it seems that it is not possible to physically remove submissions, just disabling the display because the data is simply archived. The only workaround is to delete the data directly from the database, but you have to be a DBMS expert. This is also the case for media (photos, video, and sound recordings) almost impossible to delete because of keys and table relationships.
In practice, with ODK-CENTRAL, an investigating body cannot guarantee the physical deletion of personal data. I think that ODK-CENTRAL can put investigating bodies in a position of infringement with regard to their commitments with the CNIL and with regard to the RGPD ( Article CNIL ).
It would be good if the next update of the application included the function to delete a submission (physical deletion), as soon as possible, so before the CNIL issues a restriction on the use of ODK-Central in France under certain conditions of use.
cordially