I got in my iOS app the MarketingCloudSDK (v6.4.2).
As I got this email from Salesforce:
"If you do not update your application to use the .p8 Auth Key by July 25, 2020, then your iOS messages will fail."
I will follow this actions: https://org62.my.salesforce.com/sfc/p/#000000000062/a/0M000000OMhD/Ssu9rGuCZ7kc1aAvxGmqQGIhEK_hPvOxALWwdB9D1CE
But then, do I also need to upgrade the latest MarketingCloudSDK (v7.1.1)?
If so, Am I going to be able to still send pushes to the users who have a previous app version?