If any error shall occur in any proceeding provided for by this chapter of the Charter, it shall be the duty of the City Council to correct the same, and whenever it shall be finally determined in any suit that any assessment or charge of liability against any property, or its owner, is invalid or unenforceable, for any reason, then it shall be the duty of the City Council at once to reassess against said property and its owner such proportion of the cost of improvement as may be proper, lawful and just, and the City Council shall have power, and it shall be its duty, by ordinance or resolution, to adopt such rules and regulations for a hearing to said owners before the reassessment as may be necessary legally to bind such owners and property by reassessment, and shall have power to adopt all other rules and regulations requisite to such reassessment, or fixing a charge of personal liability against such owners.