: You must document exactly what was wrong with the previous release (e.g., "Audio desync in Chapter 4").
The file you have is a version, likely containing a specific voice-over translation (lektor). To "create the feature" from these split RAR archives: brastockdra-uhd-bd-lektor-retail.part74.rar
: To create a "clean" feature, many users use tools like MKVToolNix to strip out unwanted audio tracks or menus, leaving only the main movie (the "feature"). : You must document exactly what was wrong