Why Was Excommunication Lifted Against Catholics Joining Masonry in the New Code of Canon Law?

1Peter5, Father Paolo M. Siano: From October 20 – 29, 1981, the Plenary Congregation of the Pontifical Commission for the Revision of the Code of Canon Law met in the Vatican to discuss and vote on the renewal of canon 2335 of the 1917 Code of Canon Law which conferred excommunication on Catholics enrolled in Freemasonry or other sects which conspired against the Church and against the State. This canon was ultimately not renewed in the new 1983 Code of Canon Law. More here.