State invariant exception

I am trying to integrate json form to my new project. But I am getting this error. This is related to mutation of reducer arguments

Any idea why I am getting this error. Albeit, I can turn off reduxImmutableStateInvariant but I don’t want to. Is this an already reported bug?

[original thread by shivgarg5676]

[Edgar Müller]

No, I don’t think is known AFAIK. Please open an issue, we’ll try to look into it.