Documentation says "Setting a tag with no value or value NULL removes the tag."

However all these fail with "Error assigning tag comment=: Bad Parameter":

MP4box -itags comment= test.mp4
MP4box -itags comment=NULL test.mp4
MP4box -itags comment="" test.mp4

But setting a comment with MP4box -itags comment="Test" test.mp4 does work.
Deleting itags doesn't seem to work
This is a GitHub Issue
repo:gpac
owner:gpac
Title : Deleting itags doesn't seem to work
Issue date:

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Documentation says "Setting a tag with no value or value NULL removes the tag."

However all these fail with "Error assigning tag comment=: Bad Parameter":

MP4box -itags comment= test.mp4
MP4box -itags comment=NULL test.mp4
MP4box -itags comment="" test.mp4

But setting a comment with MP4box -itags comment="Test" test.mp4 does work.
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