selectManyListbox Conversion error

[Avaneesh Arora]

In my application, I have a selecteManyListbox, but the selections are entirely optional.
I have set required="false" in the component, still I see the message:

Conversion Error setting value '' for '#{ Page1.selections}'.

The application works just fine if I select one or more options, so I do not think there is any problem in the code or the setup.

How do I skip any conversion errors, so that I can proceed without any selections?