I imported a multi body STEP file from a supplier. I found the one body I needed in the 'Solid Bodies' folder and did 'Insert into New Part...' to create a new SolidWorks part. I modified it as required. Now I cannot check it in to Enterprise PDM because it has a 'Cyclic Reference'. The only external reference in my new part is the very first step where it references the original 'Stock' part. I have tried deleting the original stock part from PDM but I still get the 'Cyclic Reference'. How can I check-in my new Solidworks part?