I have built a new site in Magento 18.104.22.168 and have imported all previous orders made on our old site. Some of these orders have payment methods associated with them that no longer exist in the new system. In order to keep the new system as clean as possible, is there a way to make Magento understand and display these old orders without installing those old payment method addons into the system?
Example: The new Magento system has a bank payment option built in, whereas the old system did not, so an addon was plugged in to allow that functionality on the old site. It doesn't make sense to install that same addon into the new system, but I would like to view those orders in the admin area.
How can this be done?