# X_NOTIFY_PUSH_MESSAGE_INVALID

## Means

a data-only push carries more than an id

## Typical cause

the data of a data-only push names a reserved key, holds more than 8 keys, or a value longer than 256 characters

## Fix

`pushChannel({ pusher, data: ({ event }) => ({ id: event.params.id }) })` — in the notifier: one id per push, the app fetches the rest over its API

[Notifications](/error-codes#notifications)