Could not fetch author data: null value in column "affiliation_country" of relation "journals_cachedauthor" violates not-null constraint DETAIL: Failing row contains (32ce2bc6-9c8e-43ef-92c5-4d9e5bfed9f3, A5104085849, Xifan Wang, State Key Laboratory of Electrical Insulation and Power Equipmen..., 257, 6999, , 2026-05-01 14:19:31.951571+00, 2026-05-01 14:19:31.951583+00, null, 41, 115, , ["Electric Power System Optimization", "HVDC Systems and Fault P..., xifan-wang-2).