Must prayers performed under the assumption of urinary incontinence be repeated, when the reality is the descent of drops of urine after urination?

If you prayed without ablution due to drops of urine exiting, while you believed you had incontinence, then these prayers are invalid. You must make up all these prayers, which are a debt upon you. If you do not know their number, then make up what will give you certainty that your obligation has been fulfilled.