In your catchment area of Clichy-sous-Bois, Montfermeil, Coubron and Le Raincy, the renumbering remains quite succinct: only lines 100, 701, 1 and 5 are changing.
Each line now has its own number in Île-de-France. You can easily access the information by typing its number into the search engine of the iledefrancemobilites.fr app or website.
Express lines are also being renumbered. The former Express 100 line becomes a new regular line, the 700 line.