Correct handling of scope filtering

When a field is passed a list of models, it coerces them into database values by collecting their primary keys. In v1.4.8 I changed the scope query to search by scope name, so when looking for integers it found no scopes. This lead to the deduplication method incorrectly identifying the first token with the same number of scopes for a given character as equivalent as it did not have the actual scope models to filter by, replacing it with the newly created token.