Channel count (8) does not match implicit channel count in mapping (2)
The channel count attribute does not match the audio channel mapping specified within the metadata.
If the file has the correct number of channels then you will need to adjust the channel mapping tag by performing a metadata only redelivery through the Backlot Delivery UI. Please contact your Netflix representative and ask them to adjust the Source Request to "New metadata only".
If the file has the incorrect number of channels then you will need to perform a regular "New source and metadata" redelivery.