Timeout error checking constraints

I'm getting a timeout error when running constraint checks against a simple test plan, using Aerie 1.0.2. The constraint check has worked on other plans, and for another user on this plan.

Seeing this error in the hasura log:

{
  "detail": {
    "http_info": {
      "content_encoding": null,
      "http_version": "HTTP/1.1",
      "ip": "137.79.200.77",
      "method": "POST",
      "status": 200,
      "url": "/v1/graphql"
    },
    "operation": {
      "error": {
        "code": "unexpected",
        "error": "http exception when calling webhook",
        "internal": {
          "error": {
            "message": "Response timeout",
            "request": {
              "host": "aerie_merlin",
              "method": "POST",
              "path": "/constraintViolations",
              "port": 27183,
              "queryString": "",
              "requestHeaders": {
                "Content-Type": "application/json",
                "User-Agent": "hasura-graphql-engine/v2.12.1",
                "X-B3-ParentSpanId": "29f1f34f10e61493",
                "X-B3-SpanId": "6483a86012540eca",
                "X-B3-TraceId": "f4e2efe74ae6b1c3"
              },
              "responseTimeout": "ResponseTimeoutMicro 30000000",
              "secure": false
            },
            "type": "http_exception"
          },
          "request": {
            "body": {
              "action": {
                "name": "constraintViolations"
              },
              "input": {
                "planId": 4
              },
              "request_query": "#graphql\n    query CheckConstraints($planId: Int!) {\n      checkConstraintsResponse: constraintViolations(planId: $planId) {\n        violationsMap: constraintViolations\n      }\n    }\n  ",
              "session_variables": {
                "x-hasura-role": "admin"
              }
            },
            "headers": [],
            "transformed_request": null,
            "url": "http://aerie_merlin:27183/constraintViolations"
          },
          "response": null
        },
        "path": "$"
      },
      "query": {
        "query": "#graphql\n    query CheckConstraints($planId: Int!) {\n      checkConstraintsResponse: constraintViolations(planId: $planId) {\n        violationsMap: constraintViolations\n      }\n    }\n  ",
        "variables": {
          "planId": 4
        }
      },
      "request_id": "9f3002ed-aa52-4e7f-95b2-a8603946f9b4",
      "request_mode": "error",
      "response_size": 984,
      "user_vars": {
        "x-hasura-role": "admin"
      }
    },
    "request_id": "9f3002ed-aa52-4e7f-95b2-a8603946f9b4"
  },
  "level": "error",
  "timestamp": "2023-01-31T18:21:26.046+0000",
  "type": "http-log"
}

The report names the Hasura GraphQL request to Aerie's /constraintViolations endpoint for planId 4, but no source file or test. Start by reproducing that request and tracing the 30-second response timeout through the constraint-checking entry point. Done means the constraint check completes successfully for the affected plan without the reported timeout.