Is it necessary to repeat the fasts observed after the discharge of brownish spotting due to not remembering to perform ghusl from it, knowing that the spotting occurred during the usual days of menstruation based on previous ignorance of its rulings?

"Disregard these whispers (waswas), and know that some scholars are of the opinion that yellowish and brownish discharges are not considered menstruation at all. If you act upon this opinion, then there is no issue for you, even if you do not perform ghusl after their cessation, and nothing is required of you."