Could not fetch author data: null value in column "affiliation_country" of relation "journals_cachedauthor" violates not-null constraint DETAIL: Failing row contains (a3cb93a9-a639-415a-9d20-53871d4a4f05, A5006546938, Hee Jin Kang, Korea Research Institute of Ships and Ocean Engineering, 38, 2373, 0000-0002-8241-3751, 2026-05-01 15:41:22.171497+00, 2026-05-01 15:41:22.171514+00, null, 9, 9, , ["Maritime Navigation and Safety", "Ship Hydrodynamics and Maneu..., hee-jin-kang).