To upgrade from any previous versions, an adjustment needs to be made in the dbforms-config.xml file if you are using BLOB-fields stored in your database and wish to retain the original way of storing that data. To do that, set the optional attribute "blobHandling" to "classic". Please see BLOB-fields for details.

   <dbforms-config>
      <table name="pets" blobHandling="classic">
      ...