What can potentially happen if the subject property of a DEC contact is not unique?

When the subject property of a DEC (Data Entity Contact) is not unique, it can lead to data integrity issues. The uniqueness of contact identifiers is crucial for maintaining the consistency and accuracy of data within the system. If multiple records share the same subject property, it becomes challenging to distinguish between them, potentially leading to confusion and errors when querying or updating records. This situation could result in incorrect associations being made, duplicated entries, and inconsistencies in data retrieval which would compromise the reliability of data management in the system.

The presence of non-unique subject properties undermines the foundational principles of proper data organization and governance, subsequently affecting reporting and analytics as well. Hence, ensuring uniqueness is vital to preserve data integrity.