Clearer errors when a database write skips a required version check
Database write, delete, and batch-write tools now give specific guidance when a required if_version was left out, backed by a version_required error code
You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
Database ToolsArea: what it touches
Internal ChangesKind: in v2.1.269,
ImprovementsSection of the release
What
Document/database write and delete tools now give a dedicated error message when a change to an existing document was missing a required if_version, distinguishing delete, update, and create/default cases with wording like "this delete carried no if_version — nothing was deleted".
The batch-write tool gives the same kind of message, naming the exact write's index and path, and warns that other unpinned writes in the same batch will fail the same way.
All these messages tell the model to read_db (or read the document) first, then resend the write with if_version set.
A new version_required reason (with a required: true field) is now returned separately from the generic version_mismatch reason, backed by a structured error-detail schema (code, kind, limit, version, index, required).
Why
This makes "optimistic concurrency" failures (where a document changed since you last read it) much easier to recover from: instead of a generic version-mismatch error, Claude Code now gets a precise explanation of what went wrong and how to fix it, reducing wasted retries on database writes.
