title: Changing generated column to not-generated in MySQL table
body: <p>I've created a MySQL table that contains a generated column:</p>
  
  <pre><code>CREATE TABLE `messages` (
      `metadata` JSON NOT NULL,
      `aggregate_version` INT(11) UNSIGNED GENERATED ALWAYS AS (metadata-&gt;'$._aggregate_version') STORED NOT NULL
  );
  </code></pre>
  
  <p>How do I change <code>aggregate_version</code> to be a non-generated column? The column type should stay the same.</p>