Information regarding Bidah and Sunnah

I have a question about ‘attahiyat’ that we read in namaz.
In bukhari shareef, it is reported that
?As long as Nabi (sallAllaahu alaihi wasallam) was present in our midst, we used to say
Assalaamualaika Ayyuhan Nabi?, when reciting Attahiyaat. But after his demise we replaced
these words with Alan Nabi (sallAllaahu alaihi wasallam) [page 926, vol.2]
Mufti saab, can you please clarify the attahiyaat that we should read? The attahiyat that I have learnt has Assalaamualaika Ayyuhan Nabi.