title: "Command should not be null" error updating default argument in AWS Glue job
body: <p>I'm trying to update <strong>programatically</strong> the parameter that I've introduced in an AWS Glue job in the following way:</p>
  <pre><code>aws glue update-job --job-name myjobname --job-update '{&quot;DefaultArguments&quot; : {&quot;MONTH&quot; : &quot;202106&quot;} }'
  </code></pre>
  <p>But gives me this error:</p>
  <p><strong>An error occurred (InvalidInputException) when calling the UpdateJob operation: Command should not be null</strong></p>
  <p>I've also tried with double dash in the key property, but gives the same error.</p>
  <p>Any idea on how to solve this?</p>
  <p>Thanks in advance!</p>