Restrict switch to products that isn't upsell of a produdct
- Go to WooCommerce subscription settings
- At "
Allow Switching", check "Between Subscription Variations" or "Between Grouped Subscriptions" - Click at "
Save changes"
- Edit the product
- Go to "
Linked products" - Define the upsells products. Is the products that you want allow to switch to.
- Check the box "restrict siwtch"