He must not replace or exchange it, good for bad or bad for good, and if he does indeed exchange one animal for another animal, then both the original animal and its substitute will be holy.
“‘If a man consecrates his house as holy to the Lord, the priest will establish its conversion value, whether good or bad. Just as the priest establishes its conversion value, thus it will stand.
If, however, it is among the unclean animals, he may ransom it according to its conversion value and must add one fifth to it, but if it is not redeemed it must be sold according to its conversion value.
And whatever holy thing he violated he must restore and must add one fifth to it and give it to the priest. So the priest will make atonement on his behalf with the guilt offering ram and he will be forgiven.”