Extinction of third party rights

On the acquisition of ownership by prescription, the third-party rights in the thing that arose before the acquisition of proprietary possession are extinguished, unless the proprietary possessor is not in good faith with regard to these rights on the acquisition of proprietary possession or unless they learn of their existence only later. The period of prescription must be completed also with regard to the third-party right; the provisions of sections 939 to 944 apply accordingly.