Is it possible to downgrade MariaDB from version 10 to version 5?

Question

• Is it possible to downgrade MariaDB from version 10 to version 5?
• Can MariaDB be downgraded from one major version to another?

Answer

According to the official MariaDB documentation, the only reliable way to downgrade MariaDB from one major version to another is to restore a full server backup (snapshot) made before upgrading.