I have two addons under https://addons.mozilla.org/en-GB/developers/addons
For a recently submitted one, I can upload(edit) screenshots/buttons.
For one which I submitted in 2021, there is no field
Images [ Edit ]
My old addon, of which new version I submitted today, has a generic icon, and no screenshots, no option to edit/add them.
What can I do? Is the standard procedure to submit an extension as a new addon every time the developer wants to change its icon/screenshots in the description?