R12 Suppliers being also customers - to enter the taxpayer id on both sides results in an error mess

Dear Payables but also Receivables comnunities,

We are facing the following issue while iimplementing Oracle eBS R12 Finance in Chile.

We have a supplier that is also one customer. As per legal requirement we have to enter the Taxpayer ID for all domestic entities in Chile (the value of the taxpayer ID associated with the check validation digit is called the RUT and is to be displayed on all official documents).

Let's take the scenarios that the customer was created first. The Taxpayer ID was then populated. Now we create the supplier. All goes fine until you enter the taxpayer ID. At that point in time we receive a blocking error message stating that another entity exists with the same taxpayer ID and that we cannot save as the Taxpayer ID should be unique.