Thanks for your answer! I was trying to create the script and I couldn't cause I'm a newbie haha. But I figured out that I was using wifi + ethernet cable, I thought it could be the wifi connection, so I disconected it. After that I used the purge option and re-scrape again some platforms and it worked. Got almost every platform working, but I couldnt do it with nintendo 64, it just wont work. When I was scrapping, i got these error messages saying the servers were overloaded, but its okay for me.
Thank you again !
Please do not post a support request without first reading and following the advice in https://retropie.org.uk/forum/topic/3/read-this-first