Steps to reproduce: 1. Put password file on samba shared folder. 2. 2 users open the file, choose a group and start adding 10 subgroups to that group simulteneously, also adding 1 password entry in each subgroup From time to time users are asked to merge the file - that is expected. But at the end I get 3 added subgroups lost! We also performed same test with keepassxc 2.7.1 appimage. Bug is there too!