Hi Blue,
I wouldn't be super worried about the warning if it's doing what you need. I have never faced that warning before when deploying a module but my guess is you are using a newer IDE that defaults to EJB 3.0 while your system is older and running a framework that supports 2.1. Likely since it is only a warning and backwards compatibility is always an aim to achieve with any new systems I would bet that you can ignore it.
Regards,
Ryan Crosby
Regards,
Ryan Crosby