If one forgets in the prostration for forgetfulness, what should he do?

The questioner : If one stays up all night in the Zaylulah, how does he wake up? Al-Kisa'i asks.

The Shaykh : Yes. It is said that Abu Yusuf, who was one of the jurists, met with al-Rashid, and al-Kisa'i, who was one of the masters of grammar, was with him. Al-Kisa'i said, "If a person delves deeply into a discipline, the ruling in another discipline does not remain hidden from him." Abu Yusuf said, "That is not possible; the sciences are different." Al-Kisa'i said, "It is not possible." Abu Yusuf said, "What do you say if one forgets in the prostration for forgetfulness?" He said, "If one forgets in the prostration for forgetfulness, there is no prostration for forgetfulness required of him." Al-Kisa'i asked, "Where did you take that from? From your grammar?" He said, "Because the diminutive is not made diminutive."
Allah knows best. Is this correct or not? If one forgets in the prostration for forgetfulness, there is no prostration for forgetfulness required of him. There is no prostration for forgetfulness required of him, but for example, if he forgets whether he performed the second prostration in the prostration for forgetfulness or not, and nothing is more probable to him, we say: prostrate once only. We do not say: prostrate once, then prostrate twice. No, we say: prostrate the single prostration in which you are in doubt, and it ends. Yes.