Demo project that shows an issue in spring mongodb.

Mongo repository throws DuplicateKeyException when I use save() method with object that was lazily loaded from @DocumentReference

Failing test demonstrating the bug is here ./src/test/java/com/example/demo/Demo1ApplicationTests.java https://github.com/MuravlevAS/spring-mongodb-reference-demo/blob/master/src/test/java/com/example/demo/Demo1ApplicationTests.java#L25-L45