diff --git a/votingapi.install b/votingapi.install
index ad300b3..2581f5d 100644
--- a/votingapi.install
+++ b/votingapi.install
@@ -43,12 +43,14 @@ function votingapi_update_8301(&$sandbox) {
 
   // Restore the data.
   foreach ($tables as $table) {
-    $insert_query = $database
+   if ($existingDdata[$table]) {
+   $insert_query = $database
       ->insert($table)
       ->fields(array_keys(end($existingDdata[$table])));
     foreach ($existingDdata[$table] as $row) {
       $insert_query->values(array_values($row));
     }
     $insert_query->execute();
+   }
   }
-}
\ No newline at end of file
+}