Plugin development from SonarJS (SonarSource-Plugin)

Hello,

used versions:
SonarQube: 9.0.1.46107
SonarJS: 8.3.0

I would like to make some changes to the SonarSource/SonarJS-Plugin for private use [https://github.com/SonarSource/SonarJS].
Therefore I try to develop my “own” plugin based on SonarJS.

If I build the plugin and add it to $SONARQUBE/extensions/plugins the SonarQube-Server won´t load and I get the error message

java.lang.IllegalStateException: Fail to load plugin JavaScript/TypeScript Code Quality and Security [javascript]
Caused by: java.lang.IllegalStateException: Unable to register extension org.sonar.api.config.PropertyDefinition from plugin 'javascript'
Caused by: org.picocontainer.PicoCompositionException: Duplicate Keys not allowed. Duplicate for 'org.sonar.api.config.PropertyDefinition-sonar.javascript.lcov.reportPaths'

or in long:

java.lang.IllegalStateException: Fail to load plugin JavaScript/TypeScript Code Quality and Security [javascript]
	at org.sonar.server.plugins.ServerExtensionInstaller.installExtensions(ServerExtensionInstaller.java:77)
	at org.sonar.server.platform.platformlevel.PlatformLevel4.start(PlatformLevel4.java:575)
	at org.sonar.server.platform.PlatformImpl.start(PlatformImpl.java:213)
	at org.sonar.server.platform.PlatformImpl.startLevel34Containers(PlatformImpl.java:187)
	at org.sonar.server.platform.PlatformImpl$1.lambda$doRun$0(PlatformImpl.java:120)
	at org.sonar.server.platform.PlatformImpl$AutoStarterRunnable.runIfNotAborted(PlatformImpl.java:370)
	at org.sonar.server.platform.PlatformImpl$1.doRun(PlatformImpl.java:120)
	at org.sonar.server.platform.PlatformImpl$AutoStarterRunnable.run(PlatformImpl.java:354)
	at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: java.lang.IllegalStateException: Unable to register extension org.sonar.api.config.PropertyDefinition from plugin 'javascript'
	at org.sonar.core.platform.ComponentContainer.addExtension(ComponentContainer.java:243)
	at org.sonar.server.plugins.ServerExtensionInstaller.installExtension(ServerExtensionInstaller.java:85)
	at org.sonar.server.plugins.ServerExtensionInstaller.installExtensions(ServerExtensionInstaller.java:69)
	... 8 common frames omitted
Caused by: org.picocontainer.PicoCompositionException: Duplicate Keys not allowed. Duplicate for 'org.sonar.api.config.PropertyDefinition-sonar.javascript.lcov.reportPaths'
	at org.picocontainer.DefaultPicoContainer.addAdapterInternal(DefaultPicoContainer.java:438)
	at org.picocontainer.DefaultPicoContainer.addAdapter(DefaultPicoContainer.java:459)
	at org.picocontainer.DefaultPicoContainer.addComponent(DefaultPicoContainer.java:556)
	at org.picocontainer.DefaultPicoContainer.access$300(DefaultPicoContainer.java:84)
	at org.picocontainer.DefaultPicoContainer$AsPropertiesPicoContainer.addComponent(DefaultPicoContainer.java:1149)
	at org.sonar.core.platform.ComponentContainer.addExtension(ComponentContainer.java:241)
	... 10 common frames omitted
2021.09.09 19:11:54 INFO  web[][o.s.p.ProcessEntryPoint] Hard stopping process
2021.09.09 19:11:54 INFO  web[][o.s.s.p.d.EmbeddedDatabase] Embedded database stopped

Is there a simple way to change the SonarJS-Plugin so that this conflict is resolved?
I do not know much about maven and professional Java development therefore I am stuck here.