Code: DUPLICATE_TRANSACTION

Duplicate transaction

What it means

This exact transaction was already sent and received before — rejected to prevent recording it twice; this is a safety feature, not a bug.

Where it appears

Syncing an offline sale, or a fast double-click on “complete sale”.

Likely causes

An automatic resend after a mid-way connection drop, or a double-click.

Safest actions

No action needed — the original transaction is already correctly recorded exactly once.

Safe to retry

No — read the safest action first

When to contact support

Contact support if you expect a sale that isn't showing in the list.