update_or_create classmethod does not seem to work properly

When trying to invoke update_or_createclassmethod, it throws strange KeyError exception when updating ForeignKeyField

Model:

class Rating(BaseModel):
    value = fields.IntEnumField(Value,
                                description="Determines the rating's value",
                                null=False)
    left_by = fields.ForeignKeyField(model_name="models.User", related_name="left_ratings", null=False,
                                     on_delete=fields.CASCADE, description="User that left this rating")
    target_recipe = fields.ForeignKeyField(model_name="models.Recipe", related_name="ratings", null=False,
                                           on_delete=fields.CASCADE,
                                           description="Recipe for which this rating was issued")

Action:

 created_rating, _ = await Rating.update_or_create(
            defaults={"value": 3, "left_by_id": user_id, "target_recipe_id": recipe_id},
            left_by_id=user_id,
            target_recipe_id=recipe_id
        )

Start by reproducing the failure through the Rating model and the update_or_create entry point using the shown ForeignKeyField arguments. Trace how ForeignKeyField values are handled during the update path; done means the operation updates or creates the rating without raising KeyError.