Please answer a question about the following article about Treaty:

Consent will also be invalidated if it was induced by the fraudulent conduct of another party, or by the direct or indirect "corruption" of its representative by another party to the treaty. Coercion of either a representative, or the state itself through the threat or use of force, if used to obtain the consent of that state to a treaty, will invalidate that consent.

What type of conduct of a party to a treaty can invalidate the consent of another party?
fraudulent conduct