The study also suggests that the solar activity estimates considered in the most recent reports by the UN’s Intergovernmental Panel on Climate Change (IPCC) likely underestimated the role of the Sun in global warming since the 19th century.”
https://www.ceres-science.com/post/new-study-suggests-global...
"The paper was strongly criticized by numerous scientists for its methodology and for its misuse of data from previously published studies, which prompted concerns about the peer review process of the paper. The controversy resulted in the resignation of half of the editors of the journal and in the admission by its publisher, Otto Kinne, that the paper should not have been published as it was."
https://en.wikipedia.org/wiki/Soon_and_Baliunas_controversy
Did it not occur to you to check this?