Creating a constrained database allows user to choose a key during the set up. This key field may be email address but can also be other field depending on the need of the organization. But with implementation of GDPR, records have to be removed based on the Key field. But current setting for the database ( non-flexible or constrained Dbs) email address is set as default lookup field and it is not possible to add any other field as GDPR lookup keys in the database setting. Could we have this feature implemented same as in flexible database ?