Unable to use: TypeError: Cannot redefine property

[ddewaele]

given the following config object :

import { Runtime } from "aws-cdk-lib/aws-lambda";
import { EnvConfig } from "../lib/types";

const envConfig: EnvConfig = {
    lambdaCodeBucketArn: "arn:aws:s3:::lambdaCodeBucket",
    runtime: Runtime.NODEJS_18_X,
    soft: {
        "x": Runtime.NODEJS_16_X,
        "y": Runtime.NODEJS_18_X,
    }
}
  
export default { envConfig: envConfig};

as defined via the following type

import { Runtime } from "aws-cdk-lib/aws-lambda";

export interface EnvConfig {
    lambdaCodeBucketArn: string,
    runtime: Runtime
    soft: {
        [key: string]: Runtime
    }
}
  

I am getting the following error

TypeError: Cannot redefine property: bundlingDockerImage
    at Function.defineProperty (<anonymous>)
    at Config.util.makeImmutable (/Users/davydewaele/Projects/Aws/cdk-simple-config/node_modules/config/lib/config.js:426:14)
    at Config.util.makeImmutable (/Users/davydewaele/Projects/Aws/cdk-simple-config/node_modules/config/lib/config.js:416:32)
    at Config.util.makeImmutable (/Users/davydewaele/Projects/Aws/cdk-simple-config/node_modules/config/lib/config.js:416:32)
    at Config.util.makeImmutable (/Users/davydewaele/Projects/Aws/cdk-simple-config/node_modules/config/lib/config.js:416:32)
    at Config.get (/Users/davydewaele/Projects/Aws/cdk-simple-config/node_modules/config/lib/config.js:170:12)

when trying to load my config

const envConfig: EnvConfig = config.get('envConfig') as EnvConfig;

The code containing the bundlingDockerImage property is this aws-cdk dependency : https://github.com/aws/aws-cdk/blob/main/packages/aws-cdk-lib/aws-lambda/lib/runtime.ts

Is this as designed ? Is the config above not supported by node-config and can I do something about this to make it work ?

Thx.