Vendor changed into the partner function of Purchase order

Hello everyone,

I person the pursuing problem, wrong the ‘partner functions’ tab of the Purchase Order determination is simply a antithetic supplier from the 1 successful the header of the document, arsenic you tin spot successful the attached photo:

The PO has nary notation document. In addition, I person checked the concern partner's maestro information and determination is nary nexus to the different supplier:

Fortunately, I checked successful the study ‘Display Purchasing Documents by Supplier’ and determination are nary POs with the incorrect supplier.
Only successful the CDS View of the PO partners the incorrect supplier appears; whereas successful the CDS View of the papers header, the lone close supplier appears.

Thanks successful advance