Missing field __typename error despite __typename being provided

apollo
1

In an optimistic response Im getting a missing field error for a field that I think I’m providing.

Here is the error:

Missing field __typename in {
  "locationLocation": {
    "__typename": "Location",
    "id": "cje287moh19io0170ll3h5zg3",
    "
writeToStore.js:111

Mutation:


const addToUserLocation = gql`
	mutation($userId: ID!, $locationId: ID!) {
		addToUserLocation(usersUserId: $userId, locationLocationId: $locationId) {
			locationLocation {
				id
				_usersMeta {
					__typename
					count
				}
			}
			usersUser {
				id
				location {
					id
				}
			}
		}
	}
`;

Function that calls the mutation:

const changeLocation = locationId => {
		const userId = userLoggedIn.id;
		props
			.addToUserLocation({
				variables: {
					locationId,
					userId,
				},
				optimisticResponse: {
					__typename: 'Mutation',
					addToUserLocation: {
						locationLocation: {
							__typename: 'Location',
							id: locationId,
							_usersMeta: {
								__typename: '_QueryMeta',
								count: 3000,
							},
						},
						usersUser: {
							__typename: 'User',
							id: userId,
							location: {
								__typename: 'Location',
								id: locationId,
							},
						},
					},
				},
			})
			.catch(error => {
				console.error(error);
			});
	};

The code appears to be working fine so could this be a bug?