mvn dependency:analyze detected wrong transitive dependency

To illustrate this issue, I created a sample project here: https://github.com/johnlinp/misc-demo/tree/master/maven-dependency-analyze-dnsjava

The dependency tree is like this:

My app ---> ApacheJMeter_http ---> dnsjava

I didn't use any code directly from the artifact dnsjava in my app. I only used ApacheJMeter_http. However, the command mvn dependency:analyze will report a used undeclared dependency: dnsjava.

[INFO] --- maven-dependency-plugin:3.1.1:analyze (default-cli) @ maven-dependency-analyze-dnsjava ---
[WARNING] Used undeclared dependencies found:
[WARNING]    dnsjava:dnsjava:jar:2.1.9:runtime 

It seems that the problem came from the line:

map.put("update", null);

If I change it into map.put("create", null); or even map.put("UPDATE", null);, the problem will disappear. Therefore, I think there might be something to do with the string "update".

Note that this issue is not reproducible in maven-dependency-plugin:2.8.