[GraphQL] add link: duplicate node id

Is there an existing issue for this?

[X] I have searched the existing issues

What happened?

I've been getting an Unhandled Promise Rejection. Reason: [t [CombinedError]: [GraphQL] add link: duplicate node id] error twice now, in a random fashion (so, not reproducible...), in a promise within Empirica.onStageEnded. This does not make the server crash, but the games where this happens do not behave as intended.

Steps To Reproduce

No response

Empirica Version

Version: v1.8.12
SHA:     656d19b
Build:   159
Branch:  main
Time:    2023-12-26T07:14:40Z

What OS are you seeing the problem on?

Linux

What browser are you seeing the problem on?

Chrome

Relevant log output

Unhandled Promise Rejection. Reason:  [t [CombinedError]: [GraphQL] add link: duplicate node id] {
  graphQLErrors: [
    ga [GraphQLError]: add link: duplicate node id
        at TW (/tmp/6f4f016c6f6c7f55/node_modules/@urql/core/src/utils/error.ts:24:10)
        at Array.map (<anonymous>)
        at t (/tmp/6f4f016c6f6c7f55/node_modules/@urql/core/src/utils/error.ts:61:5)
        at x1 (/tmp/6f4f016c6f6c7f55/node_modules/@urql/core/src/utils/result.ts:22:15)
        at Object.next (/tmp/6f4f016c6f6c7f55/node_modules/@urql/core/src/exchanges/subscription.ts:82:15)
        at Object.42cbf88e-bc76-4921-ba7d-9adac8c16d2b (/tmp/6f4f016c6f6c7f55/node_modules/graphql-ws/lib/client.mjs:361:42)
        at emit (/tmp/6f4f016c6f6c7f55/node_modules/graphql-ws/lib/client.mjs:77:94)
        at Object.emit (/tmp/6f4f016c6f6c7f55/node_modules/graphql-ws/lib/client.mjs:104:21)
        at Pe.X.onmessage (/tmp/6f4f016c6f6c7f55/node_modules/graphql-ws/lib/client.mjs:200:29)
        at Yh (/tmp/6f4f016c6f6c7f55/node_modules/ws/lib/event-target.js:290:14) {
      path: [Array],
      locations: undefined,
      extensions: {}
    }
  ],
  networkError: undefined,
  response: undefined
}
22:42:43.258 WRN failed load: [GraphQL] add link: duplicate node id
22:42:43.258 WRN failed load: [GraphQL] add link: duplicate node id

Anything else?