Divorce

Same is valid no need to do anything

Divorce decree is valid throughout your lifetime unless challenged and set aside by the court. The trouble for you will not be divorce decree for getting out of the livein relationship you continued even after the divorce but the act of continuing relationship with your ex-wife without her being informed of exitance of decree of divorce that dissolved your marriage that happened in 2006. After 10 years if you move out, she will lodge criminal complaint against you for cheating and rape for all that happened between both of you in the last 10 years, be careful before you take any step forward now.

you are divorced.  she is not your wife.  she can only claim maintenance.

but did you live togather after divorce after convincing her that you are husband and wife?

see your other thread

https://www.lawyersclubindia.com/forum/details.asp?mod_id=141695&offset=2

also advised in details at

https://www.lawyersclubindia.com/forum/After-divorce-livein-relationship-140051.asp

also repeated

https://www.lawyersclubindia.com/forum/details.asp?mod_id=140051&offset=2

Divorce is not a very pleasant process, because it takes a long time, you can just look here https://lawrina.com/blog/how-long-does-an-uncontested-divorce-take-in-ny/, and see how many details you need for a complete divorce.