I had this problem myself when developing the plugin. I think you used sonar, an archetype plugin, to create your environment. If you do so, your entire project is under the GNU 3 license, and it is expected that the title in each class will report this. The predefined pom.xml contains the part where it is defined. Find the โlicenseโ in your pom.xml and delete this part.
If this is not a fix, you simply add -Dlicense.skip=true to your maven target.
The expected title is similar (note that the first things are set when using -sonar-archetype)
Krummy
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