Merci pour votre réponse. Effectivement, j'ai un autre site web, mais je ne trouve nul part la possibilité de supprimer ou préciser si il s'agit d'un site par défaut ou non...

Hi,

Go to Website > Configuration > Websites to see the list of all created websites.

Click on the website you want to delete to open its configuration form.

Make sure the website is not set as the default site -Odoo won’t let you delete it unless another one is set as default.

If needed, set another website as the default by checking "Default Website" on a different site first.

Return to the website you want to remove and click the "Action" button, then choose Delete.

Confirm the deletion in the popup - the site and its configuration will be permanently removed.

Hope it helps.