{"id":"dynamodb-putitem-full-replace-not-merge","text":"PutItem replaces the entire item if a matching primary key exists — non-specified attributes on the old item are lost; use UpdateItem for partial updates.","truth_value":"IN","source":"entries/2026/03/11/amazondynamodb-latest-APIReference-API_PutItemhtml.md","source_url":"","source_hash":"bb016de9e0628e59","justifications":[],"dependents":[],"metadata":{},"explanation":{"steps":[{"node":"dynamodb-putitem-full-replace-not-merge","truth_value":"IN","reason":"premise"}]}}