Yes your settlement in the first case can be treated as proof. But the second suit on the same subject matter is barred by res judicata.

share the Settelment deed that was entered upon earlier 

Also you may go ahead and file FIR against the said person for blackmailing you.

the Settelment in the previous case might go against you in several instances 

See you can file a petition before high court for getting direction for police to file FIR against said person for intimidation and threat .And making forged marriage certificate and blackmailing you 

See this is big issue and you should immediately take steps. 

You can contend before the court that first settlement was done under coercion and threat. 

See you can contest same on ground that settlement was on ground of coercion and blackmailing.

You can file Cheating case Under 420,468 against him and also you can file Criminal Defamation and Civil Defamation  and claim Compensation. 

If you have any Proof Like Transaction id or any document relevant Evidence then you can file Recovery of money Suit and Demand refund of amount along with interest. 

if semi nudes pictures of yours have been superimposed on your other pictures and he is threatening you file case against black mailer under section 67A of IT act for theretneing to transmit your pictures 

2) there is no evidence of your alleged marriage 

3) you can always explain circumstances under which you paid him Rs 2 lakhs and did not contest the false section 9 field b6 him 

Phone calls , messages , etc prove that the person was stalking you 

1. As per the information mentioned in the present query, makes it clear that you have been tortured mentally as well as monetary.
2. The settlement may impact on the evidence by you as it shows that in a wa that you have done something wrong and paying him because of your fault.
3. Now, what you can do is that you may make a statement as you were afraid at that time, but again may not help you much.
4. Now, I advice you to please show me the all documents, so that can understand as per the language of the settlement to save you from this litigation.

Dear Client,

Since your husband is in your support, file criminal complain for threat and extortion. Morphing your pictures.His case already failed for not able to prove marriage and even if it is assume that arya samajh marriage was actually happened still while subsisting of previous marriage , second marriage is void, never exited and no chance of reconciliation.

It was really bad on your part to agree for settlement previously. Well, it was all done under intimation and extortion and to save your existing marriage. Same put before court and file criminal complain.

The proof of settlement in the fist instance may be taken as an evidence to sujpport his pleadings, however you may insist on your marriage with your husband solemnised in the year 2002 and reject his petition stating that the so called marriage with him even if accepted is null and void in law since there persisted a mrriage as on that date.

You can also inform court that he threatened or blackmailed you with some photographs to be exposed before the world hence you were forced to accept his demand.

You can expose his deeds of the past by hich you were made to accept them under duress, the court should be convinced about the past deeds in order to get a favourable decision in your side.

though i dont have any document to prove the blackmailing.

Even though you dont have any proofs to prove the same, you can add the same in your pleadings as well as in your chief examination