Hi
Can you try the following
On top of Planning Worksheet you can see the name (template). Create one for vendor 10000 (name 10000) and one for 20000. Then add the vendor 10000 lines in template 10000 and then regenerate the plan for vendor 20000 in 20000.
Basically anytime you run Calculate Regenerative plan bc clear that template. In addition, if you have a part in others template and BC needs to regenerate it for new template it will remove it from other template.
Also, in template 20000 if you select both 10000 and 20000 BC will remove parts from template 10000.
This is to keep planning clean and avoid duplication.
