Schema error defined in cps.v1.json openapi documentation is used in other clients (i.e. rcp.v1.json)

[mbizjak]

I see in cps.v1.json under components/schemas/Error:

"Error": {
        "title": "Error",
        "type": "object",
        "properties": {
          "errorMessages": {
            "type": "array",
            "minItems": 1,
            "uniqueItems": true,
            "items": {
              "type": "string"
            }
          },
          "traceId": {
            "type": "string",
            "format": "uuid"
          }
        }
      }

This error seems to be used in cps.v1.json as well as in rcp.v1.json, pcp.v1.json and ccp.v1.json for 404 http error code (see here):
"$ref": "./cps.v1.json#/components/schemas/Error"

While for other http error codes (i.e. 400) each client uses it's own error defined under "components/schemas/Error".

I am curious as to why is this the case?
Since Error defined in cps and rcp is the same, why doesn't rcp use its own "local" error (and not /cps.v1.json)?

Thanks!