Gale Digital Scholar Lab‘s Sentiment Analysis tool will be updated on 13 July. According to Gale:

“Sentiment Analysis currently uses the 111 version of the AFINN lexicon to score tokens in the tool. From 13 July, Sentiment Analysis will migrate to the 165 version of the AFINN lexicon, which includes an additional 905 scored tokens.”

This means that analysis runs made before 13 July will not be directly replicable afterward.