PRODUCT401: Stock stale
What this means
The displayed stock may be older than the store stock.
Verify current stock in the store before completing a sale that could oversell the item.
Your data
No data is at risk — the till's stock figure is simply older than the store's and catches up when sync recovers. If this persists, ask the person who manages your WordPress site.
Troubleshoot
At the till: before selling a low-stock item, confirm the real quantity — check the shelf or with your manager — rather than trusting the till's number, which may lag the store.
To fix the lag: stale stock usually means sync has been failing or paused — check Store health → Logs for sync errors and resolve those. After sync recovers, the stock display catches up on its own.