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null value in column "session_id" of relation "courseApp_trackevent" violates not-null constraint DETAIL: Failing row contains (10110, null, logout, {}, 2026-05-26 19:00:22.147146+00, 2026-05-26 19:00:22.147531+00, null, Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; C..., null).