Unsuccessful Voting

Exploration Stage: Octopus Citadel
From: Mr. Black
Description: Violet is definitely lying. She kept silent about the first vote for the post of Head of the Security Service. It was carried out as a secret ballot, not an open one. Here, I found some stamped ballots. There’s only one missing, help me find it!
Completed: Thank you for finding the last stamped ballot! Hmm, now everything is clear to me. Only Violet’s faithful Octopuses voted for her candidacy. She didn’t get enough votes, so she decided to hold a second vote, making it an open one.