Break connection between  drawing and a part

The connection is made when you first inserted a part and saved the drawing.This is done so that when you change the model, the drawing updates.

Now the drawing has been "Saved As" a new name but keeps the reference to the old part. You can change this reference easily as a thread on this can be found at How do I change the file referenced in a drawing? and/OR this video Changing a drawing reference in SolidWorks - YouTube

Hi Ilan

When you open a drawing, you can click the Reference button to see which part/assembly model was referenced by this drawing.

You can change the reference model if you want.

If you want to completely break the link between drawing and part, you can save the drawing as a Detached drawing.