Laravel JSON field can't update or updateOrCreate if not exist

Using Laravel 5.6. I have JSON field called metas Inserting and Updating works as expected except 1 thing: if field doesn't exist in metas it will not be created on update or updateOrdCreate methods. Fields that exist updating without problem.

Here is excample metas content:

{
    "date": "2018-09-17",
    "name": "r08"
}

I can update "date" and "name", but there will be some situations where I need to add new field for excample "distance", I can't do this:

Registries::where('id', $registry_id)->update([
    'metas->distance' => '200km'
]);

Also tried:

Registries::where('id', $registry_id)->updateOrCreate([
    'metas->distance' => '200km'
]);

No errors.

via Chebli Mohamed