What provoked the civil unrest incidents which started in 19th January 2023 in France based on the below passage?

The civil unrest in France on 19 January 2023 was provoked by the new proposal from the Borne government to increase retirement age.The current retirement age is 62, which is proposed to be increased to 64. Opponents of the bill organised protests against the government who used Article 49.3 of the constitution to force the bill through the parliament .