I get an error when I try to start a project in debug

Question

When i try to run my project in debug mode, i get immediately an error. This error shows up only in debug mode, when i run my project it works how it should.

My java and javac version are the same.

i'm using JDK 1.5 for my project

enter image description here

FATAL ERROR in native method: processing of -javaagent failed
java.lang.UnsupportedClassVersionError: Bad version number in .class file
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:621)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
    at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
    at `enter code here`sun.instrument.InstrumentationImpl.loadClassAndCallPremain(InstrumentationImpl.java:133)
Exception in thread "main"