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null value in column "session_id" of relation "courseApp_trackevent" violates not-null constraint DETAIL: Failing row contains (10671, null, logout, {}, 2026-06-01 18:18:48.522201+00, 2026-06-01 18:18:48.522562+00, null, Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; C..., null).