customize jsf validator msg

i have the following in my messages.properties file:

javax.faces.component.UIInput.REQUIRED=Please enter a value for {0}
javax.faces.validator.LengthValidator.MINIMUM = At least {0} characters are required for {1}
javax.faces.validator.LengthValidator.MAXIMUM = At most {0} characters are required for {1}

when error occurs, i got these outputs:

At most 8 characters are required for pwd At most 8 characters are required for pwd
At least 6 characters are required for pwd At least 6 characters are required for pwd

as it shows, it repeats, how can I change the msg that just appear once?

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