There is nothing wrong, except ...

8938:scanner: LTO Ultrium-4 tape 2223712427 for volume 001653L2 conflicts with 
existing media database entry for LTO Ultrium-2 tape 2223712427

However, this is severe. NW obviously uses the same volid but treats the tape 
as LTO4 and consequently sees a volume conflict which is not resolveable.

When we recently upgraded from LTO3 to LTO5, we did not have this problem. 
However, we are running 7.6.2.5.

You have 3 options:
  - Delete the existing media from the index and rescan it.
  - And an old LTO2 drive (if still available, used as readonly) and try a 
scan/recover from here.
  - Get in touch with EMC support - they should know the issue. If so they will 
most likely ask you to update.

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