Could not fetch author data: null value in column "affiliation_country" of relation "journals_cachedauthor" violates not-null constraint DETAIL: Failing row contains (2ded3ded-be91-45e1-ae1d-488cc8af2bbf, A5088506188, Shanling Ji, Munich Center for Machine Learning, 13, 182, 0000-0001-6659-3767, 2026-04-18 07:35:17.027459+00, 2026-04-18 07:35:17.027475+00, null, 6, 6, , ["Advanced Battery Technologies Research", "Advancements in Batt..., shanling-ji-1).