"The 3 figure commercial key # is not unique" Error while creating UoM in Different Languages

Hi,

I'm trying to creating UoM in different languages using CUNI and getting error "The 3 figure commercial key # is not unique" .Could you please advise to come out from this error. attached is teh screen shot.

Ex: UoM for dimension Proportion. Here I've % in 'Percentage' and I'm trying to creating equvalent in Chinese(ZH language code)

Thanks,

Srini