Upon the failure of the property owner or person in possession to pay the abatement costs to the city for all sums expended in abating a nuisance or preventing its recurrence and all civil penalties, the costs shall become a lien upon the property on which the nuisance is abated, or its recurrence prevented, when notice of the lien is filed and recorded as provided in CMC 8.36.090. However, if the property has been conveyed prior to the recordation of the lien, the lien shall not attach to the real property, but shall remain the debt of the person who owned the land at the time the costs were incurred, and the debt may be recovered in a civil action by the city against the debtor. (Ord. 563 § 1. 2002 Code § 9-8.8).