In the Taraweeh Salaat, the Imam forgetfully left out the “لا” of the word of the first Sajda in the 30th Juz. Will this nullify the Salaat? If the Imam performs the Sajda Tilawat, woud it compensate for the mistake? What if the Ayat is read over, would the Salaat become proper? Does he have to perform another Sajda?
In this case, by omitting the “لا” the meaning of the word is changed. Such change that has taken place in the meaning is one of those mistakes that cause the Salaat to become null and void. And as such this Salaat has become invalid.
However, if the mistake is rectified by reading the ayat again, then the Salaat would become proper, and another Sajda would not be Wajib. By mere performance of the Sajda Tilawat the mistake would not be rectified.
(Munyatul Musali, Fasl Zilatul Qari, Pg.476)
And Allah knows best
Mufti Waseem Khan
This answer was collected from DarulUloomTT.net, which is operated under the supervision of Mufti Waseem Khan from Darul Uloom Trinidad and Tobago.