Why are "planned start" and "planned end" columns not editable?

Hi,

I have been trying to track project schedule variances against original actual dates, and was trying to leverage Planned start and planned end date column for the same. but when I add these columns, I cannot seem to edit these. Can someone please advise?

@visbha2001 The “planned start” and “planned end” date values are pulled from the project’s baseline, which is why these values are not editable. More information about working with baselines is available here.

Hope this helps!