As explained a 2018 Genius Feature, this lyric is being changed for their 2019 tour, as some of the group members are uncomfortable with the chance that the lyric will be taken as racist.

A source told The Sun,

The reality is it’s not acceptable to say that now. Some of the girls feel uncomfortable getting up on stage and performing that lyric, especially when they have such a diverse and multicultural fanbase. They pride themselves on standing for inclusivity, so they don’t want to run the risk of offending anybody.

The place referenced in this original lyric, Timbuktu, is a city in the West African nation of Mali. It is sometimes used to describe a place located extremely far away.

It is also known as the El Dorado of Africa because of it’s yellowish looking buildings made of sands and the fact that it had become a cultural center and a major center for the trans-Sahara gold trade in the 14th century.