He may not replace it or make a substitution for it, either good for bad, or bad for good. But if he does substitute one animal for another, both that animal and its substitute will be holy.
He is to make restitution for his sin regarding any holy thing, adding a fifth of its value to it, and give it to the priest. Then the priest will make atonement on his behalf with the ram of the guilt offering, and he will be forgiven.
‘When a man consecrates his house as holy to the Lord, the priest will assess its value, whether high or low. The price will stand just as the priest assesses it.
If it is one of the unclean livestock, it can be ransomed according to your assessment by adding a fifth of its value to it. If it is not redeemed, it can be sold according to your assessment.