Fix issue with restoring backups older than the last new DB table created.

src/Console/Command/Backup/RestoreCommand.php

@@ -80,9 +80,14 @@ class RestoreCommand extends CommandAbstract
             return 1;
         }
 
+        // Drop all preloaded tables prior to running a DB dump backup.
         $conn = $em->getConnection();
         $connParams = $conn->getParams();
 
+        foreach ($conn->fetchFirstColumn('SHOW TABLES') as $table) {
+            $conn->executeQuery('DROP TABLE ' . $conn->quoteIdentifier($table));
+        }
+
         $this->passThruProcess(
             $io,
             'mysql --host=$DB_HOST --user=$DB_USERNAME --password=$DB_PASSWORD $DB_DATABASE < $DB_DUMP',