Solving: Uncaught (in promise) Error: Cannot assign to read only property 'getPosts'. following freeCodeCamp.org's tutorial: React / GraphQL Course - Build a social media app (MERNG Stack) @4:05:00

client\components\PostForm.js

/*
* When following freeCodeCamp.org's youtube video tutorial: React / GraphQL Course - Build a social media app (MERNG Stack)
* I have got stuck @4:05:00 because I got an error that says:
* Uncaught (in promise) Error: Cannot assign to read  only property 'getPosts' of object '#<Object>' 
* that is happening because in apollo-client 3.6 (which I am using) immutability became mandatory, so, we can't assign new key
* to existing variable anymore like this: data.getPost = [resault.data.createPost, data.getPosts], but the solution is very simple:
*/

// instead of: 
data.getPost = [resault.data.createPost, data.getPosts]
// replace it with
data = { getPosts: [resault.data.createPost, ...data.getPosts] };