Investigate GraphQL validation error

[bprusinowski]

Describe the bug

In the Docker container used to deploy the application, sometimes we encounter a GraphQL validation error.

web-1  |  ⚠ "next start" does not work with "output: standalone" configuration. Use "node .next/standalone/server.js" instead.
web-1  |  ✓ Ready in 2.5s
web-1  | [ValidationError: Variable "$sourceUrl" of type "String!" used in position expecting type "DataSourceUrl!".] {
web-1  |   locations: [ { line: 1, column: 41 }, { line: 4, column: 16 } ],
web-1  |   path: undefined,
web-1  |   extensions: { code: 'GRAPHQL_VALIDATION_FAILED' }
web-1  | } undefined

While it doesn't seem to affect end users, we should investigate to find and fix a root cause behind this.

Environment

• Visualize environment and version: PROD v6.1.2