Magento 2.0.18 is the final 2.0.x release. After March 2018, Magento 2.0.x will no longer receive security patches, quality fixes, or documentation updates. To maintain your site's performance, security, and PCI compliance, upgrade to the latest version of Magento.
After you have completed your migration and thoroughly tested your new Magento 2 site, perform the following tasks:
Put Magento 1 in maintenance mode and permanently stop all Admin