JabRef 5.0--2020-03-06--2e6f433
Linux 5.3.0-45-generic amd64
Java 13.0.2

• [x ] I have tested the latest development version from http://builds.jabref.org/master/ and the problem persists

Steps to reproduce the behavior:

1. Add a file link to an entry
2. Navigate to the file entry
3. The file already has the same name it will get with the automatic rename.
4. Right clink file entry.
5. Choose rename file to a defined pattern.
6. Error box says "'File' exists. Overwrite file?"
7. Click overwrite.
8. File is deleted.