Kotlin, how to retrieve field value via reflection

So I have thousands of fields in a couple of classes and I'd like to write some methods on them where they automatically println each field and its corresponding value

At the moment I have this:

inner class Version(val profile: Profile) {

    @JvmField val MINOR_VERSION = glGetInteger(GL_MINOR_VERSION)

    fun write(file: File? = null) {
        //file.printWriter().use { out -> out.pri }
        this::class.java.fields.forEach {
            println(it.isAccessible)
            println(it.getInt(it)) }
    }
}

But this is what I get:

false
Exception in thread "main" java.lang.IllegalArgumentException: Can not set final int field uno.caps.Caps$Version.MINOR_VERSION to java.lang.reflect.Field
    at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:167)
    at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:171)
    at sun.reflect.UnsafeFieldAccessorImpl.ensureObj(UnsafeFieldAccessorImpl.java:58)
    at sun.reflect.UnsafeQualifiedIntegerFieldAccessorImpl.getInt(UnsafeQualifiedIntegerFieldAccessorImpl.java:58)

Any idea?