https://community.appian.com/discussions/f/administration/23748/external-deployment---limitationHello Appian group, Today I have probably observed one limitation for external deployment: 1.) In the case if I am importing by using external tool (used deployment REST API) package from older version to newest version of Appian (20.1 -&gt; 21.3)en-USTelligent Community 12https://community.appian.com/thread/91258?ContentTypeID=1Fri, 18 Feb 2022 13:56:05 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:651a39eb-bac5-4e64-a7b2-f0b0a5f2326cPeter Lewis<p>Deployment APIs were introduced in 21.2:&nbsp;<a href="https://docs.appian.com/suite/help/21.2/Appian_Release_Notes.html#programmatic-deployments-via-api">https://docs.appian.com/suite/help/21.2/Appian_Release_Notes.html#programmatic-deployments-via-api</a>.&nbsp;Maybe since the package was created before that release, the import didn&#39;t work correctly? Regardless it&#39;s probably worth opening a support ticket to have our support team investigate and determine if this is expected behavior.</p><div style="clear:both;"></div>