New Deployment for existing project

I have a client who has already built a project with a channel-type website on the Kentico administration page (CMS). Let's call this Project A. Currently, I have created a new project, Project B, with a channel type of Headless. I attempted to create a deployment package to publish it to the QA environment. After publishing, I checked the CMS and noticed that the headless channel was created successfully. However, the existing channel (Project A) seems to have been replaced by the new one. As a result, I can no longer preview the existing pages on the QA CMS.

When I created Project B, I followed the instructions from scratch using the first installation guide. I used the kentico-xperience-mvc template. My question is: How can I publish Project B to the portal without replacing the existing project (Project A)?

I followed the instructions in the Deploy to SaaS guide to create the deployment package. I'm using the same salt hash from the portal when i created Project B