Database
[{_id:ObjectId("63e501cc2054071132171098"),name:"Ricky",discriminator:7706,registerTime:ISODate("2023-02-09T14:23:08.159Z"),friends:[{friendId:ObjectId("63e502f4e196ec7c04c4351e"),friendshipStatus:null,privateChannelId:ObjectId("63e66dd85eb6c3cc248ecc95"),active:true}]}]
Query
db.collection.update({_id:ObjectId("63e501cc2054071132171098"),"friends.friendId":ObjectId("63e502f4e196ec7c04c4351e")},{$set:{"friends.$.friendshipStatus":1}})