Hi
If the super was paid on the unused holiday pay - was it done manually ?
If not manually then the unused holiday pay must have calculated the super at the time and when the adjustment was done it should have cancelled each other out. Unless you corrected the unused holiday pay item prior to the fix.
If it was done manually and therefore already been paid then don't pay it this time manually.
If it was automatic and wasn't cancelled out on the pay run then I would delete that pay adjustment and redo manually changing the super to zero if you can - or you may need to change the unused holiday back to include super and redo
Hope this helps
Lisa