Okay danke, und, ausprobiert über den API-Request, ist das die Lösung? Wir haben den WooCommerce Support wegen eines leicht anderen Problems (der "Upgrade/Downgrade"-Button ist im Shop nicht zu sehen, obwohl es sich um eine variable Subscription handelt) kontaktiert, was aber aus Paypal-Sicht wahrscheinlich keinen Unterschied macht (in beiden Fällen ändert sich die Höhe der zu buchenden Summe), und folgendes Feedback erhalten, vielleicht für andere hier auch interessant: (TLDR: Man braucht "Reference Transactions" bei Paypal wenn man alle WooCommerce Subscriptions Funktionen nutzen will) Looking at your site for us today it seems all of the subscriptions which have been purchased have been paid for using PayPal. With PayPal, it's not possible to Switch Subscriptions as the PayPal Standard and PayPal Express Checkout services are limited with regards to what features of WooCommerce Subscriptions are supported. This is why you're not seeing the Upgrade/Downgrade button when using WooCommerce Subscriptions. This documentation below explains the limitations of Paypal Standard and this also applies to Paypal Checkout too without having Reference Transactions enabled on your account for that payment gateway. https://docs.woocommerce.com/document/subscriptions/limitations-of-paypal-standard/#section-5 Note: It's only PayPal Checkout which supports Reference Transactions and PayPal Standard ( Which nearly all your subscriptions have been paid for ) will never allow for subscription switching. This documentation describes in more detail Reference Transactions when using Paypal. It can also be incredibly hard as a business to qualify for Reference Transactions when using PayPal. https://docs.woocommerce.com/document/subscriptions/faq/paypal-reference-transactions/ We'd advise switching to a card payment method like Stripe which fully supports all of the features of WooCommerce Subscriptions and will allow for subscription switching. You can see a full list of all the payment gateways which support advanced features of WooCommerce Subscriptions like subscriptions switching within this documentation below. https://docs.woocommerce.com/document/subscriptions/payment-gateways/#advanced-features I hope this helps.
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