Got a skippable error as they move to new house.
Where did you get your game from? There was an audio track called SexRomantic in versions prior to 0.1.0 during the move in scenes, but the track was deleted in 0.1.0 and all references to it replaced with SexRomantic2 (probably a music licensing thing?) So you must have an alpha/beta or modified release or something?
If you really wanted to fix it you could just drop this in notepad either added directly in tthe script.rpy file where the other audio call outs are or in a new file and save it as something like audiofix.rpy (make sure to pick type as all files).
define audio.SexRomantic = "sfx/SexRomantic2.mp3"
Or just continue skipping errors, the track was only used a couple times, and since it's already been fixed it won't be an issue in future versions.