Could not fetch author data: null value in column "affiliation_country" of relation "journals_cachedauthor" violates not-null constraint DETAIL: Failing row contains (ee4425ca-c98d-4eda-9a11-42af385efeb0, A5004816619, Zongren Peng, State Key Laboratory of Electrical Insulation and Power Equipmen..., 323, 3419, 0000-0003-4344-3701, 2026-05-01 21:34:53.584789+00, 2026-05-01 21:34:53.584805+00, null, 27, 74, , ["High voltage insulation and dielectric phenomena", "Thermal An..., zongren-peng).