Answer
When the “Parent” field is enabled (editable), you can do this. When it is disabled (grayed out), it is locked and you cannot. It is disabled when there are payments made to the contact as well as certain other financial information. If you are dealing with a customer that has moved and you have a new owner, there are methods for that.
Related Topics
https://www.aptora.com/tips/change-of-property-ownership/