Expected results

Trying to insert into a collection that does not support pk alterations should not fail using Rules.

Actual Results

Since sync client tries to always set pk field _id, if the schema does not support alternation of the pk, the insertion will fail.
Eg this schema does not allow _id alternations, thus insertion will always fail (since we are setting _id in the sync client):

{
   "collection": "momentInteractions",
    "database": "db",
     "roles": [
     { 
         "name": "creator",
          "apply_when": {},
          "fields": {
          "_id": {
                      "write": false
           },
           "viewer": {
                     "write": true
            },
           "isPermitted": {
                    "write": true
           }
      },
      "read": true,
      "insert": true,
      "delete": false,
      "search": false}]
}

Steps & Code to Reproduce

1. Using Rules, set up a schema in mongo db atlas that does not support alternation to primary keys.
2. Try to insert into the collection.
3. Insertion will fail, reporting that the constraint around the PK has not been respected.