Making any changes to main domain hosting parameters overwrites subdomain settings.
For example, main domain configured to use
ASP 4.0 , but subdomains have
ASP 2.0 .
ASP 4.0 in Hosting Settings for main domain and applying changes will also change
ASP version to 4 on all subdomains.
This is a
Plesk feature. Hosting settings are synchronized with subdomains if
Hosting settings management permission is switched off on the subscription.
Enable Subscription > Customize > Permissions > Hosting settings management permission to change this behavior.