With a project with a created mapping data, it 's impossible to download this project with this new mapping data. Only the default mapping data is saved. Have you got this problem ?
thank you for your answer
From the User Guide, under Import and export a project: Exporting a project does not export its mapping or its users. If you need that, look at project cloning and at how to transfer project ownership.
If you clone a project, the mapping gets cloned as well, and you have the option to clone its users.
Data are not copied over