Redirect main site broke subsites?

I changed my permalink from

/%post_id%-%postname%/

to simple

/%postname%/

and i inserted this 2 lines in htaccess

RedirectMatch 301 ^/(\d+)-([^/]+)/$ https://www.lospaziobianco.it/$2
RedirectMatch 301 ^/(\d+)-([^/]+)/amp/$ https://www.lospaziobianco.it/$2/amp/

but seems i can’t reach any subsites after that. Ex:

https://www.lospaziobianco.it/lonework/2017/03/11/messaggero-gender-ambiguo-dei-fumetti/
https://www.lospaziobianco.it/alcaffedelcappellaiomatto/2017/03/14/pi-the-sky-with-planets/
https://www.lospaziobianco.it/superpoteredelgiorno/

Someone may help me?