changing reference when opening a drawing

I have a drawing called 0001 that originally was referencing a part 0001.  I did save as copy of 0001 drawing to 0005 drawing, and then using solidworks explorer I did a replace in 0005 drawing that was pointing to 001 to point to 0005 part.  Then when I opened 0001 drawing I found it pointing to 0005 part ????

So then I opening 0001 drawing from within solidworks and clicked on the references button to make it point back to 0001 part, and when I hit open it just crashes solidworks?????  Restart and it stills does the same thing .......

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