If you want to change the date of a color formula, you will soon notice that this is not possible within Optios. This was deliberately not allowed, for safety reasons. The list of color formulas is sorted from most recently to the oldest color formula. If you accidentally change a date of a color formula as a user and change it incorrectly, that could lead to a dissatisfied customer.
It is best to learn within the salon and the team to immediately note new color formulas on the customer chip. So that it is on the right date and later changes are no longer necessary. (time-saving and more satisfied customers!)