Please note that this forum is meant for questions in English. Based on translation, your question seems to be whether you can upgrade an existing system from community edition to enterprise after having purchased a subscription.
Yes, you can. First, you need to add your subscription key to Proxmox VE. After that, you can add the enterprise repositories either by editing the /etc/apt/sources.list manually or through the web UI in the Repositories menu of your nodes.
Please note that this forum is meant for questions in English. Based on translation, your question seems to be whether you can upgrade an existing system from community edition to enterprise after having purchased a subscription.
Keep in mind that usually packages in enterprise repo are older than those in no-subscription because enterprise uses the most stable ones. After activating the subscription and running apt update you will probably see no package ready to update if your system is already up to date with the no-subscription repo.