Invalid "Opportunity Id" on order page. URL No Longer Exists
AR: Magento Admin is able to provide an invalid "Opportunity Id" on the order page. No validation for the "Opportunity Id" field
Step to reproduce
Go to Magento Frontend and place order
Go to Admin panel - Sales - Orders - open created order
Select the "Salesforce" tab and check "Opportunity Id" field is filled
Change "Opportunity Id" and click the "Save and Sync Order" button
Click the "View in Salesforce" link to view the new Salesforce Opportunity page
Note1: "URL No Longer Exists" page opens
Our module does not have validation for manually provided Invalid "Opportunity Id"