ObjectID doesn't work in atlas

[Kostya_N_A]

hello everyone, I refer from one collection to another in atlas via ObjectID , but it does not work, what else needs to be done in order to work correctly

Field author in Product schema:

 author: {
      type: Schema.Types.ObjectId,
      ref: 'authors'
    },

[Kostya_N_A]

i add ObjectID field manually via UI atlas