Is it obligatory to make up for 32 days of intentional fasting over five years as expiation for them?

If semen was actually discharged due to masturbation and you knew that it invalidates the fast, then you only need to make up for that day (qadaa'), because expiation (kaffarah) is only obligatory for breaking the fast through sexual intercourse. However, if you were ignorant that masturbation invalidates the fast, then you do not need to make up for that day, due to the excuse of ignorance.