To me it still looks okay so far, leaf color looks okay, roots growing nicely..thankfully it is the lower leaf. If it does not spread, I will just let it be. Try to provide good airflow around it, bright light access, much more than a Phal needs. It is still quite young, so be careful it does not get sunburnt. In time, it may have new basal growth or maybe some keikis anywhere up and down the cane.
Don't know your location, but my Dens during summertime gets frequent watering here. They handle our warm to hot dry weather even our heat waves, as long as they get good airflow around and daily watering here since our area is bone dry.
So analyze your growing area and adjust the watering as your growing situation needs it.
