Partial Decree obtained by fraud due to which execution petition is pending since the year 2001

Dear Sir / madam, Partial Ex parte decree was passed by senior division in the year 1997 in favour of the plaintiff. The Advocate appeared on behalf of the defendants was shown duplicate but he wasn't appointed by the defendants in the said suit. Thereafter Decree holder showed civil miscellaneous application was filed by the defendants but it wasn't and under the said application also showed advocate found duplicate but wasn't appointed by original defendants. Then Decree holder filed execution petition in the year 2001 but till today's it's pending and Execution Court cannot execute the decree due to location of the land isn't knowing to anyone including court despite 3 measurement maps are filed and exhibited in the court by court commissioner. Also the area of the land is not available at actual which mentioned in the decree. 4000 Sq M land to give under execution but at actual only 1850 Sq M is available. So execution court cannot go beyond Decree and hence it's unexecutable. Now judgement debtor wants to file new suit or wants to restore the said suit so that decree holder cannot get the said land under the decree obtained by fraud and misrepresentation. Therefore humble request to suggest me can we file fresh suit with same cause of action before the same court who passed decree in the year 1997 and also request to suggest under which section of CPC we can file new suit or restore the suit on the ground decree obtained by fraud. The duplicate advocate under whose name the original suit was decreed partially in the year 1997 has given an letter in the year 2022 addressed to the defendants that i am unknown to the clients who were defendants in the suit of the year 1997 so we have new cause of action to go ahead. So kindly suggest me cpc section please thanks