Echoing this, we have touched on this in several other discussions and it depends on personal goals and training plan timing. Keeping the current FTP helps push further into Progression Levels of related workouts. This can be good for working on overall intensity (gets pushed up with higher levels), or time to exhaustion (longer intervals and shorter recovery with higher levels).
It can also depend a bit on the delta of the FTPs. A couple of percent may be worth pushing forward without accepting the new value. But maybe 5% or higher deltas is worthwhile to accept the increase.
There is no single or simple answer, and people need to consider at least a couple of factors IMO.