Supplying Plant in Outline agreement

Dear Team,

Greetings !!..

While trying to create a contract (MK/WK both), a field supplying plant is coming in the header data. But we are unable to determine the source from where this field is being picked. I have attached a screenshot for the same. Kindly help us with the issue.

Old contracts for the same vendor do not have this field.

Many thanks in advance for your help.

Best Regards,

Nitin Naudiyal