A candidate can only be active once in the same campaign. If you add the same candidate again, NIXZ does not create a duplicate campaign enrollment.
The existing campaign position remains leading. This prevents a candidate from receiving the same steps multiple times or being counted twice in the campaign.
If you want to approach a candidate again, first check the current status inside the campaign. Depending on the situation, you can resume the candidate, follow up manually, or add the candidate to a different campaign.