diff --git a/odoo_sh/advanced/upgrade_your_database.rst b/odoo_sh/advanced/upgrade_your_database.rst
index 03f22e822..1c130e48a 100644
--- a/odoo_sh/advanced/upgrade_your_database.rst
+++ b/odoo_sh/advanced/upgrade_your_database.rst
@@ -14,6 +14,9 @@ exact copy and without filestore options. Upload the .sql.gz dump on https://upg
 select the Testing Purpose. If you have custom code, you can choose to have it upgraded by us, or do it yourself. Once
 it's processed, you'll get a dump of the database in return.
 
+.. Warning::
+Do *not* upload *backups* of your production database (found in the Backups tab of the production branch) as these are incompatible with the Upgrade platform - they contain your complete sources, etc. that are not needed for the upgrade. Make sure to download a **Dump** instead - either through the Backups tab using the *Download Dump* button or through the Builds page by using the *Download Dump* entry of the contextual menu of your latest production build.
+
 2. Test your upgraded database
 ------------------------------