How change the value in the Automatic Payment Authorization of supplier invoice

Hello,

In the supplier invoice there is a filed called “Automatic Payment Authorization”. When an invoice is created this field has the same value has the same field in the the Supplier → Invoice → General tab.

The description of the “Automatic Payment Authorization” field in the supplier invoice indicates “...the suggested authorization level for individual invoices can be changed manually.” 

But I did not succeed to change the value of this field. This field takes always the same value as same field in the Supplier → Invoice → General tab.

Any idea how to update the “Automatic Payment Authorization” field in the supplier invoice ?

Thank you