OK, I don't remember the reason the lslk file is in the bin directory when you install from a .bin file, but it should be removed, and either have the lslocks or no file on Debian 12?
I think we included lslk in order to use it with LOKUTL.LIT, but I'm not sure anyone has any interest in that utility any more. I'll look into whether it's practical to include lslocks (i.e. doesn't create any conflicts with other packages) and whether LOKUTL can be updated to work with it).