# Reason `'empty'`

> Contract 2.0.0 · package sha256 `a857eca95b35921109faf997094bb4192f12527d9d0fcd4be7e97f06425bad6e` · generated from `configurator-runtime.d.ts` and `tables/problems.json` by `services/onsite-scripter/scripts/build-contract-docs.mjs`; edit the source, not this file.

A member of [`Reason`](../api/Reason.md) · stable · since 2.0.0

undo or redo had nothing to do.

## Where the declaration names it

- [`Session.redo`](../api/Session.redo.md): As `undo`: in the write queue; ends an open group at its call; always moves the history pointer, except on 'rolled-back' / 'internal-error'; 'committed', or 'refused' with reason 'empty'.
- [`Session.undo`](../api/Session.undo.md): Outcome: 'committed', or 'refused' with reason 'empty'.

The set is open: handle a code you don't know (`'other'`).