Which led to the highly polished NASB.
Looks to me like the "highly polished NASB" left out someone's specific name.
Isaiah 14:12a [NASB] How you have fallen from heaven, you star of the morning,
Isaiah 14:12a [KJB] 14:12 How art thou fallen from heaven, O Lucifer, son of the morning!
I get the impression Satan doesn't like seeing his name in print; preserved for all generations to see.