Update of relationship properties via `set` operation does not work in update mutations

[andreloeffelmann]

Describe the bug
When updating relationship properties via set operation within update mutations, it does not work.
The query returns with a valid response, but the properties are not updated.

Type definitions

type TypeCodePlaceholder @mutation(operations: [CREATE,UPDATE,DELETE]) @node @subscription(events: []) {
	id: String!
	values: [TypeCodeValue!]! @relationship (type: "TYPECODEPLACEHOLDER_HAS_TYPECODEVALUE", properties: "TypecodeplaceholderHasTypecodevalueProperties", direction: OUT, nestedOperations: [CREATE, UPDATE, DELETE, CONNECT, DISCONNECT], queryDirection: DIRECTED) @settable(onCreate: true, onUpdate: true)
}

type TypeCodeValue @mutation(operations: [CREATE,UPDATE,DELETE]) @node @subscription(events: []) {
	id: String!
}

type TypecodeplaceholderHasTypecodevalueProperties @relationshipProperties {
	order: Int!
}

To Reproduce
Steps to reproduce the behavior:

1. insert a TypeCodePlaceholder with id= A
2. insert two TypeCodeValues with id=B and id=C
3. connect these with the TypeCodePlaceholder and set the relation property order to 1 for B and 2 for C
4. Execute the following Mutation

mutation {
  updateTypeCodePlaceholders(
    where: { id: { eq: "A" } }
    update: {
      values: [
        {
          update: {
            where: { node: { id: { eq: "B" } } }
            edge: { order: { set: 2 }}
          }
        }
        {
          update: {
            where: { node: { id: { eq: "C" } } }
            edge: { order: { set: 1 }}
          }          
        }
        
      ]
    }
  ) {
    typeCodePlaceholders {
      valuesConnection {
        edges {
          properties {
            order
          }
          node {
            id
          }
        }
      }
    }
  }
}

6. check the response:

{
  "data": {
    "updateTypeCodePlaceholders": {
      "typeCodePlaceholders": [
        {
          "valuesConnection": {
            "edges": [
              {
                "properties": {
                  "order": 1,
                },
                "node": {
                  "id": "B"
                }
              },
              {
                "properties": {
                  "order": 2
                },
                "node": {
                  "id": "C"
                }
              }
            ]
          }
        }
      ]
    }
  }
}

7. The values for the order property have not been updated

System (please complete the following information):

• Version: @neo4j/graphql@7.4.0

[neo4j-team-graphql]

We've been able to confirm this bug using the steps to reproduce that you provided - many thanks @andreloeffelmann! 🙏 We will now prioritise the bug and address it appropriately.