The king signed the Magna Carta under duress. He had the Pope annul it a month or two later. LOL
Just as did the King, who signed the Treaty Of Paris in 1783, accepting our Declaration of Independence. Of course a Government that comes to terms with an uprising is under duress.
The Crown did get away, in the 1297 republication of Magna Carta, with leaving out the enforcement provisions--as to the Barons raising the country against the Government. There are similar parallels in the way Constitutional Government has been corrupted among these States.