Could not fetch author data: null value in column "affiliation_country" of relation "journals_cachedauthor" violates not-null constraint DETAIL: Failing row contains (6d3f1763-6395-46a0-9c19-98adfbd29051, A5103024729, Shûichi Ohno, Osaka Metropolitan University, 264, 2811, 0000-0002-4813-2622, 2026-04-26 06:08:35.985011+00, 2026-04-26 06:08:35.985032+00, null, 26, 48, , ["Advanced Wireless Communication Techniques", "Holomorphic and ..., shuichi-ohno).