Test fails due to value not being removed from trie object

There is a very low probability issue where values are not removed from the Trie object. The link below shows the details of the test failure in CI. https://app.circleci.com/pipelines/github/planetarium/libplanet/15895/workflows/af8f6823-a797-468d-8e8f-26b2f86d0ccc/jobs/64103