@Guillaume Imbert possibly something is cached. have you tried a full rebuild? if that doesnt help, maybe try to invalidate the cache of intellij

Yep. A bit of context : the object was primarily designed without identifier. Now we want to add it. On my app I get the beans from a ws through retrofit. On first call I didn’t have any ID, so I generate and inject it. But the bean created after the first retrofit holds a null value in a non-null property. That’s weird

You have to keep in mind, that

String?

is just a kotlin specific thing, the JVM doesn't know anything about

val

or non-nullable things