encryption enabled on both cookie persistence profile and http profile in LTM 12.x version

Hi , I have a critical change to enable cookie encryption preferred on LTMs.Previously we acheieved the encryption through http profile but now we are moving to cookie profile.WIll there be any breakage in application if I enable \ encryption on the associated cookie profile for a VIP where http profile is already in encrypted mode..I mean if the VIP have both http and cookie profile encryption enabled and with the different encryption phrases. Which one will have higher priority , http profile encryption or cookie profile encryption?

please help.