My best guess would be that your data is going through pseudonymization and so you are no longer uniquely identifiable. [1] By contrast to anonymization, Artic

My best guess would be that your data is going through pseudonymization and so you are no longer uniquely identifiable. [1] By contrast to anonymization, Article 4(5) of the GDPR defines pseudonymization as “the processing of personal data in such a way that the data can no longer be attributed to a specific data subject without the use of additional information.” By holding the de-identified data separately from the “additional information,” the GDPR permits data handlers to use personal data more liberally without fear of infringing the rights of data subjects. This is because the data only becomes identifiable when both elements are held together. [1] https://iapp.org/news/a/looking-to-comply-with-gdpr-heres-a-primer-on-anonymization-and-pseudonymization/ https://iapp.org/news/a/looking-to-comply-with-gdpr-heres-a-...