# X_NOTIFY_CHANNEL_DUPLICATE

## Means

two deliveries share one channel name

## Typical cause

two `deliver` entries naming the same channel. Refused because the delivery ledger's unique index is `(notifier, key, channel, coalesce(recipient, ''))`: the second delivery would claim a row the first already owns and be dropped as a duplicate, so one of the two would silently never send

## Fix

give the second channel its own name on `notifier("<name>")` — `deliveryChannel('<name>-digest', …)` — or merge the two `deliver` entries

[Notifications](/error-codes#notifications)