Proplem with Strapi client v4

Question

I am watching a video in youtube tutorial working with strapi here is the link : https://www.youtube.com/watch?v=gPFbxwRGhiQ&list=PLVpp0SvtYtdfMvoSB1NwHq3J0MFHSz5FQ&index=17 at 4:34 ,You can see the field relationthe relation .I did exactly and save then the client crash the report. then i go to the file Profile (\my-project\src\api\profile\content-types\profile ) It add this "user": { "type": "relation", "relation": "oneToOne", "target": "plugin::users-permissions.user", "inversedBy": "profile" } same with the User-permission (\my-project\src\extensions\users-permissions\content-types\user) "profile": { "type": "relation", "relation": "oneToOne", "target": "api::profile.profile", "mappedBy": "user" }

I can't get it what wrong and how to fix (the strapi of video use is v3 and i use v4) Can any body help me ,thank you very much