Why can't I delete this WAV. file?

[D0mi39]

So I was making a group of VOICEVOX files until I accidentally put one that I didn't want in there. When I tried to delete it, it disappeared for 1 second and then came back. I don't know what's going on, I tried every way possible, and it still won't get deleted. Since VOICEVOX is all in Japanese, I have to translate everything. Please, some VOICEVOX expert, fix this for me.I'm using Windows 11 and grouped the files as a zip file.

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