> ## Documentation Index
> Fetch the complete documentation index at: https://moengage.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Why Is Push Notification Failing With the "Requestedentitywasnotfound" Error?

> Resolve push failures from the Requestedentitywasnotfound error when FCM tokens are no longer registered. Steps to reconnect and update tokens.

## Problem

Push notifications are failing due to the "Requestedentitywasnotfound" error.

## Explanation

This error occurs when the FCM token you are trying to use to send a push is no longer registered. It is treated the same as a "NotRegistered" error, meaning the app may have been uninstalled.

## Solution

Perform the following steps:

1. Reconnect to the database.
2. Ensure all tokens are active and in use.
3. Delete or update any unused tokens.

For more information, refer to the ["Requested entity was not found" error](https://stackoverflow.com/questions/56216887/requested-entity-was-not-found-error-when-trying-to-send-a-push-notification-u).