The court shall determine the true and just amount which any property attempted to be specially assessed for a special improvement should pay to make the same uniform with other special assessments for the same purpose, whenever any action or proceeding shall be commenced and maintained before the court to prevent or restrain the collection of any special assessment or part thereof made or levied by the officers of any municipality for any purpose authorized by law, if such assessment shall be held to be void by reason of noncompliance with any provision of the laws of this state. Unless the action challenges the determination of benefits and special assessments imposed for agricultural property, the amount of the assessment as the same appears on the assessment list shall be prima facie evidence of the true and just amount, and judgment must be rendered and given therefor against the party liable for such special assessment without regard to the proceedings had for the levy thereof. The judgment shall be a lien upon the property upon which a special assessment shall have been levied, of the same force and effect as the lien of a special assessment, and the lien of such special judgment shall be enforced by the court in such action. No action for said purposes shall be maintained unless it is commenced within six months after the special assessment is approved.