11.5.10.2 - creating a non-catalog requisition Global CPA but different purchsing site

Hi,

  

We have created a Global Contract(CPA) 100 in OU1 against supplier site SI11 and created org assignments(in Enable Organizations form) for another operating unit OU2 and supplier site SI21

also there is another supplier site SI22 for that supplier in OU2.

  

now we want to create a non-catalog requisition against CPA 100 and supplier Site SI22, but when we enter CPA 100 in iProc, system defaults SI21 and makes it readonly.

Note: system allows only one record per Operating Unit in "Enable Organization" window.

any idea how to achieve this?

   

e.g. if we have a Global Contract with Oracle London, and want to create a requisition(PO) using that Contract but against Oracle Glasgow how to do it?