Does semen discharge, unintentionally released after masturbation without arousal, invalidate the fast?

Masturbation is forbidden even if it does not result in the emission of semen. If a fasting person masturbates during the daytime in Ramadan and semen is emitted, their fast is broken and they must make up that day, unless they were ignorant that masturbation invalidates the fast, in which case they are not required to make it up.

Therefore, one must repent and make up the day whose fast was broken due to masturbation if they knew that it invalidates the fast.