I haven't been following this in detail but it's been in the works for a while as part of the conditions for allowing government money to go to AF......I guess it plays well with the Green lobby/pushes business onto the trains/releases some Orly slots for other operators.
The basic idea is to pull AF off those short routes where there is a parallel option to use the TGV.
https://www.air-journal.fr/2020-06-2...e-5221001.html