Warnings on Calculated id attribute

This works but generates a warning in view editor regarding the id being used eslewhere. If course it is not duplicated because the statements which have the same signature are in a switch so are not executes all at the same time. Any ideas how to circumvent the warnings without resporting to dechecking options in the compiler ?

  <input type="radio"  id='@("Q_" + q.ID  )'  value='@o.ID' />

Thanks