To add different versions of the same module in the Odoo app store, you will need to follow these steps:

1. Go to the Odoo App store website and log in to your account.

2. Click on the "Publish" button in the top right corner of the page.

3. Select the module that you want to add a new version of.

4. Click on the "New Version" button.

5. Select the version of Odoo that the new version of the module is compatible with, and fill in the other required information such as the version number, changelog, and the archive of the module.

6. Click on the "Save" button to submit the new version for review.

7. Once the new version is reviewed and approved by the Odoo team, it will be available for download in the app store.

It is important to consider that every time you want to upload a new version of the module, you need to increment the version number in the manifest.py of the module and also include the changelog of the new version.

It's also worth noting that, before publishing a new version of the module, it's important to test it thoroughly to ensure that it works as expected and it is compatible with the latest version of Odoo.