Here's how to fix this in the NCX.
<meta content="urn:uuid:c22d9e01-0d3c-4009-82df-3287f82ac7eb" name="dtb:depth"/>
should be...
<meta content="urn:uuid:c22d9e01-0d3c-4009-82df-3287f82ac7eb" name="dtb:uid"/>
Somehow you've changed dtb:uid to dtb:depth and that's what is causing the error.
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