Explained in the comments.

For context, As the first stanza of the "Deutschlandlied" is historically associated with the Nazi regime and its crimes, the singing of the first stanza is considered taboo within modern German society. Although the first stanza is not forbidden within Germany based on the German legal system, any mention of the first stanza is considered to be incorrect, inaccurate, and improper during official settings and functions, within Germany or abroad.

In 1974, the singer Nico released a recording of all three verses as the last track on her album The End....

In 1977, the German pop singer Heino produced a record of the song which included all three stanzas for use in primary schools in Baden-Württemberg. The inclusion of the first two stanzas was met with criticism at the time.

In 2009, the English rock musician Pete Doherty sang "Deutschlandlied" live on radio at Bayerischer Rundfunk in Munich with all three stanzas. As he sang the first stanza, he was booed by the audience. Three days later, Doherty's spokesperson declared that the singer was "not aware of the historical background and regrets the misunderstanding". A spokesperson for Bayerischer Rundfunk welcomed the apology, noting that further cooperation with Doherty would not have been possible otherwise.

When the first stanza was played as the German national anthem at the canoe sprint world championships in Hungary in August 2011, German athletes were reportedly "appalled". Eurosport, under the headline of "Nazi anthem", erroneously reported that "the first stanza of the piece had been banned in 1952 ".

Similarly, in 2017, the first stanza was mistakenly sung by Will Kimble, an American soloist, during the welcome ceremony of the Fed Cup tennis match between Andrea Petkovic (Germany) and Alison Riske (U.S.) at the Center Court in Lahaina, Hawaii. In an attempt to drown out the soloist, German tennis players and fans began to sing the third stanza instead.

Also, in 2018, during the 2018 World Masters Athletics Championships in Málaga, Spain, the first stanza was mistakenly played when Thomas Stewens, a German athlete, won a gold medal in a decathlon. He instead sang the third stanza.