Upgrading from 2.8.3 to 3.0.2

[haraleib]

Hello, I want to upgrade from 2.8.3 to 3.0.2, but I am quite unsure about what to look for when I update.
Jenkins tells me "Attention: The new version indicates that it is incompatible with the installed version. Projects using this plugin may need to be reconfigured accordingly. For more information, please refer to the plugin's release notes."

As statet here the last big change was Porting to Java 11: https://plugins.jenkins.io/bitbucket-push-and-pull-request/releases/
Is there a upgrade guide or something else available? I didnt find something here: https://plugins.jenkins.io/bitbucket-push-and-pull-request/