Error Code 8032
This is caused by an invalid variation relationship, when child variation is already assigned to a parent SKU. This error code only applies to variation relationships. It is returned when the child in the variation relationship already has another SKU stored as its parent.
Solution:
You must first delete the old relationship before submitting the new one. To eliminate a relationship, you can delete either the parent or child product. When you delete a parent, you remove the relationship between that parent and all its children. When you delete a child product, you eliminate the relationship between just that one child product and its parent.
After you remove the original relationship, you can re-assign the child product to a new parent product. To do this, you can use delete and recreate and update product data from StoreAutomator.