Originally Posted by
WildcatYXU
There should be no fare difference as the zone and distance didn't change. But the ticket would be repriced to current levels.
These two sentences are contradictory. The former doesn't really make sense, given this clearly involves AC metal and is therefore priced dynamically - zone and distance don't really matter, because AC charges whatever it wants to charge. But yes, changing this booking to be in J would trigger re-pricing, which might be terrible, or it might not.