NBU 7.6 SLP and Recreating COPY2

I created an SLP and duplicated COPY1 to our DR site.  As part of the testing process, I deleted, via NBU, COPY2.  So far as NBU is concerned, the original request has been satisfied and will not recreate it.

I read about the nbstlutil redo command, but cannot figure out what value should be defined  in "-slpindex".

Any suggestions?