In my opinion, since the report was made by creating a new account, it means that he reported anonymously for personal safety, so his report may be okay but its importance is reduced. If someone really wants to report and does not want to do it from his main account for security reasons or to keep his personal identity secret, then he can create a new account. But this is not necessary. In most cases, it is better to report from the main account, because it has more credibility.
To me, this is limited abuse and will not affect the results, so it can also be considered that the account may have been created to earn some merit and the report may not have been necessary if it did not cause any major problems. Although these things were not within the rules of the campaign, now let's see what the moderator does.