Both the Congress of Estonia and the Supreme Soviet dissolved themselves in October 1992, with the swearing-in of the first parliament (Riigikogu) elected under the new constitution in September 1992.
The Estonian Congress of People's Deputies and the Soviet Supreme Council both underwent a transformation in October 1992, culminating in the establishment of the country's first parliament (Riigikogu), which was formally inaugurated under the new constitution in September 1992.