JabRef version

Latest development branch build (please note build date below)

Operating system

GNU / Linux

Details on version and operating system

JabRef 5.7--2022-06-01--943489e || Linux 5.10.0-14-amd64 amd64 || Java 18.0.1 || JavaFX unknown

Checked with the latest development build

• I made a backup of my libraries before testing the latest development version.
• I have tested the latest development version and the problem persists

Steps to reproduce the behaviour

1. Copy two articles (InCollection) from the same book to a new database
2. The second entry that is copied is marked as possible duplicate although author, title, and citationkey deviate.

Appendix