Super Admins of both accounts can revoke the established Affiliations.
To revoke an Affiliation
Navigate to Admin Settings | User Access Management > User Groups > Affiliations tab.
Under the Actions column, you can find:
Click the Delete icon of the established affiliation.
Now the selected Affiliation is revoked along with the affiliated user groups.
Click Revoke in the Revoke Affiliation window.
After revoking the affiliation, the organization loses control or access to the resources.