Mark the activity as non-commissionable: This will prevent it from showing up in your commission tracking dashboard. You can still view these bookings by checking 'Include Not Commissionable Bookings'.

If it's a cruise booking: Go to the pricing tab and expand the cruise package. Select all items in the package and choose 'Remove from trip package'. Delete the empty package that remains. Verify individual items are still listed. Click 'Publish' to update the changes.