recovering (articles) from a previous version

As many, I had problems when upgrading from 2.3.8 to 2.4.1. After doing the migration manually with the following command:
`$ docker exec -t NAME_OR_ID_OF_YOUR_WALLABAG_CONTAINER /var/www/wallabag/bin/console doctrine:migrations:migrate --env=prod --no-interaction`

I still could not get my docker instance of wallabag up and running. So I made a backup of the wallabag directory, and started from scratch. Doing so, I have now the last version running on a container, but obviously, no content.

As I still have the backup of the old instance, would it be possible to move the content to the new instance? If so, how could I do it?

Thanks in advance