One of the requirements for WP Migrate DB Pro is that the site you’re migrating to / from has the same table prefix. You can read the reasoning for this requirement in a blog post dedicated to the topic.
Attempting to migrate a database from one WordPress installation to another with different table prefixes results in a warning message similar to the following.
Each warning message is different depending on the situation, so you should follow the instructions showing in your plugin rather than those above. In most cases, this should resolve the issue.
If you are still having issues, you may want to try changing your table prefix using a plugin like Change Table Prefix.