I have a co64.atom and would like to replace/insert it to a moov atom.

I was able to remove a co64.atom using the following syntax:
`mp4edit --remove moov/trak/mdia/minf/stbl/co64 moov.atom moov.atom_edit`

However I'm not able to replace or insert a new co64.atom to the same moov.atom file:
`mp4edit --insert moov/trak/mdia/minf/stbl:co64.atom moov.atom moov.atom_edit`

I get the following error:
`ERROR: failed to create atom`

Thanks for any advice.
How to insert or replace co64.atom to the moov atom? 
This is a GitHub Issue
repo:Bento4
owner:axiomatic-systems
Title : How to insert or replace co64.atom to the moov atom? 
Issue date:

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I have a co64.atom and would like to replace/insert it to a moov atom.

I was able to remove a co64.atom using the following syntax:
`mp4edit --remove moov/trak/mdia/minf/stbl/co64 moov.atom moov.atom_edit`

However I'm not able to replace or insert a new co64.atom to the same moov.atom file:
`mp4edit --insert moov/trak/mdia/minf/stbl:co64.atom moov.atom moov.atom_edit`

I get the following error:
`ERROR: failed to create atom`

Thanks for any advice.
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