Originally Posted by
DYKWIA
From another thread :-

This accurately reflect the new configuration of 35J seats versus the previous 42J seats.
Row 5 (7 seats) was removed from the first J cabin and Row 6 in the second J cabin was renumbered to row 5.
This was done to significantly increase the pitch in rows 1-4 to enable passengers to pass their seat mate instead of having to step over them (when the seat is in the flat position).