New in jamf : only numeric code for iOS in 6 digits

Hi, i try some parameters in profil, but can't find the way to force user to add a code into 6 digit and only numeric.
always if i use the parameters size of code the prompt ask for a code with charcaters and numeric.

If i only check the code requier, i was prompt for a numerci code but only on 4 digits ;(

Regards,
Cedric