[Zubersoft]

Do not edit the song and add the file that way - that's not going to replace the file in the way you want. It will replace the existing file in the storage location (which is what that warning is about). MobileSheets doesn't have logic for that scenario to detect that you are importing a file with the same name as an existing song in the library which also matches an existing file in the currently edited song. It's just warning you that you are going to be replacing a file in the storage location. Instead, you can either tap Import->OneDrive, select your file and when the conflict dialog is displayed, select the option to update the existing song in the library, or long press your song, tap the three dots at the top right and tap "Swap File". That will swap in the new file without impacting your annotations.

As a side note, you may be able to get away with removing the existing file in the song editor and adding back the new version, as I did add code to persist the annotations when this occurs, but it's better to be explicit about it with the swap file feature or by importing the same file again.

Mike