.p12
has the certificate which are used to create the provisioning profiles
. (.p12 file also has the keychain keys )
So you dont have to worry that using .p12
files will update any other apps.
Provisioning files are used to sign the apps and based on that you can upload and update any app.
You just need to create a new provisioning profile with the .p12
certificate in dev Center and use it to sign your app and submit.