When I close my application I get the following message

QSqlDatabasePrivate::removeDatabase: connection 'menu_settings' is still in use, all queries will cease to work.

Not sure what this is. I have tried closing all the databases I make, and I have tried clearing all of the queries I have made and nothing seems to get rid of this message. The only thing that I know does work is if I don't use the database in a plugin, I don't get this message.

Thanks