Delete function / irreversible deidentification in the IT system?

When clicking on this bar, you will be able to see the gaps within the category.

It must be possible to delete or de-identify personal data. This gap is removed by selecting “Yes” in the system description, when it is ensured that the delete function is fully implemented (1).

It must be justified why ‘Delete function / irreversible de-identification in the IT system’ is not relevant (2).