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ClassCastException on class org.eclipse.jdt.internal.core.JavaNature

after upgrading to Eclipse 2024-03, i've got a lot of error of this kind : Stacktrace : java.lang.ClassCastException: class org.eclipse.jdt.internal.core.JavaNature ...
GitHub

Java Model Exception: Error in Java Model (code 969): src/main/.... [in app] does not exist

!SESSION 2024-06-10 14:22:56.108 ----- eclipse.buildId=unknown java.version=21.0.1 java.vendor=Eclipse Adoptium BootLoader constants: OS=linux, ARCH=x86_64, WS=gtk ...