Hi All, This is (probably) my first post on this list. I had the pleasure of meeting some of you recently in Helsinki (and before that in Dublin in 2019). I live in Krakow, Poland and take care of several Koha installations in medium-sized scientific and theological libraries. Much of my time is spent analyzing and correcting bibliographic data. However, if my libraries encounter any problems in Koha, I try to report them in Bugzilla and, if possible, provide patches as well (I sent the first official patch in 2011). Sometimes I don't have enough patience or time and I patch problems locally (forgive me, I feel guilty here)... The Helsinki meeting encouraged me to use ktd more intensively. Here, however, I run into a problem trying to use persistent data (kp command as described at https://gitlab.com/koha-community/koha-testing-docker/-/wikis/Koha-Testing-D ocker). Docker creates the koha_db-data volume as expected. However, after shutting down the test environment (with kd command), when trying to run it again (kp), the koha container does not start properly -- it ends with the message: Database is not empty! at /kohadevbox/misc4dev/populate_db.pl line 103. Indeed, the populate_db.pl script is executed unconditionally when starting this container. Question: what am I doing wrong or what did I not understand? What should be the scheme of working with persistent data? I would appreciate a hint. Greetings, Janusz