Mass update many-to-many field

Hi there,

I have a very quick question, to which I may have the answer already but I am going to ask anyway: is it possible to use the Mass Update action to change a many-to-many field? When I try, I get an error that says "Unable to mass update ManyToManyField without 'validate'". Therefore, in theory, if the field was validated, it should be possible?

Thanks!
Nicola