Number of channels defined in IMF (8) does not match Asset channel mapping count (6).
A discrepancy exists between the number of channels within the IMF package and that specified within the metadata.
It should be possible to correct this issue by performing a metadata only redelivery through the Backlot Delivery UI. Ensure the metadata accurately reflects the number of channels present in the IMF package. Ask your Netflix representative to adjust the Source Request to "New metadata only". They will let you know when you can then attempt the metadata only redelivery.