This APSIS One API feature is in development and it's not meant to be used yet
Unmerge a profile
Unmerge a single profile designated by the keyspace discriminator and the profile key provided in the request from a group of two or more merged profiles
For example let's assume there are merged profiles A+B+C with keyspaces email + mobile + CRM (respectively). When we request to unmerge profile B via mobile keyspace then profile B is unmerged from A+B+C giving a standalone profile B and merged profile A+C. Data from profile B which was part of A+B+C before the unmerge call remains under A+C profile after profile B has been unmerged.
A previously unmerged profile can be merged back to the same or a new group.
If a profile is stand-alone then a request to unmerge it does not result in an error.
This feature is available for accounts with channel-specific topics enabled.
The following error scenarios are specific to this feature:
400 Bad Request
An attempt was made to unmerge a canonical profile
404 Not Found
The specified keyspace or profile was not found
The profile that is requested to be unmerged is locked