Are the lyrics of the three sets of cars wrong?

Russian Folk Song: Troika

тройка

Вот, мчится, тройка почтовая

по Волге-матуше зимой

ямщик, уныло напевая

качает буйной головой

О чём задумался, детина

Седок приветли во спросил，

какая на сердце кручина

скажи ,тебя кто оторчил?

Ах, добрый барин, скоро святки,

и ей не быть же мой

Богатый выбрал да постылый,

Ей не видать весёлых дней

There are only three paragraphs here. The original song has six paragraphs. The third paragraph in this article is made up of the fourth and fifth paragraphs of the original text. The song's creation year, lyricist, and composer are unknown (probably there is no record --- this is the characteristic of Russian folk songs). The content of the lyrics is a description and autobiography of the environment of the three-horse mail coach on the Volga River (Part 1) and the words of the young coachman. The central meaning of all the lyrics is to express the sadness and melancholy of the young coachman when he will lose his dear girl. Of course, "Old Horse" is also among them (sixth paragraph). The translation of the third paragraph that we usually sing and read only has an old horse but no girl, which is of course puzzling. At the same time, we should understand that the translation of works is a process of re-creation, and the translation can have its own style without violating the will. For more details about this song, I hope to read my blog in half a year.