RFC Destination Settings

Hello Gurus,

Earlier we had 2 ECC systems in the landscape.

Purchase requisition A from APO system supposed use RFC destination 1 and reflect in Plant XXXX

Purchase requisition B from APO system supposed use RFC destination 2 and reflect in Plant YYYY

Now we have only 1 ECC system in the landscape. we have changed the publication settings accordingly. but preq still not getting transferred correctly to ECC system.

Debugging the code shows system trying use wrong RFC destination.

Is there any other configuration setting we are missing.

Please advise.

Thanks In Advance

Shyam