nope, HP and LP are interchangeable on most guns, some operate more efficiently (they don't use as much air) with different tanks... and i don't know if the promster is LP or HP, but it will be fine either way
Both tanks will work fine. If anything bad happens from using a HP tank on you're gun, it's either user error or you have the 1 of thousands of ICD guns that fail due to an HP tank.