This is probably the most serious overbook I have ever seen.

I was returning from Seoul in Y. There was an a/c change from a 343 to a 33B. 343 has 30 J seats or 38 J+F seats. 33B has 41 J seats. There were still three J passengers (as I was told by one of them) that could not be accommodated. So the flight was oversold by 6 to 14 passengers, depending on what 343 was originally planned. They were probably out of the old 44-seat 33A (?).

The result:
* One or two upset passengers.
* Rearranging Y passengers to accommodate the downgraded J passengers.
* Busy crew. The ISM was personally serving one of the downgraded passengers, bring in things from the J section. A senior FA greeted a few passengers (not me though - the second or third time ever since I was a DM). I am not complaining - the crew is under a lot of stress.

I spoke with one of the downgraded passengers. He traveled often enough that he knew these things happen and someone had to concede. He did not want the crew to feel worse than they already did.