Cannot update action kind if runtime is no longer supported

I tried to update the kind of an action that has an old runtime that has been removed, but this fails with the following error message:

$ wsk action update foo --kind nodejs:10
error: Unable to create action 'foo': The 'nodejs:10-fat' runtime is no longer supported. You may read and delete but not update or invoke this action. (code Jhgg2GzINamHp5yxACGBXjCbcViyU8bD)

The nodejs:10-fat is indeed an old runtime that has been removed. I found the error message at:

https://github.com/apache/incubator-openwhisk/blob/master/common/scala/src/main/scala/org/apache/openwhisk/http/ErrorResponse.scala#L56-L63

so it looks like a backend issue and not an issue from the wsk CLI.

I'd have expected that it is possible to update the kind in order to update all actions that use some deprecated runtime without having to redeploy the code.

cc: @csantanapr as discussed on Slack