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On Tuesday, March 31, 2015, we released a patch for the on-premises version of Apigee
Edge.

> [!NOTE]
> **Note:** Contact [Apigee Edge Support](https://docs.apigee.com/api-platform/troubleshoot/support) if you have questions or issues.
>
> To sign up for release notifications, see [Get Apigee Edge release notifications](https://docs.apigee.com/release/get-release-notifications) for the
> Public Cloud and Private Cloud feed URLs.

If you have questions, contact [Apigee Edge Support](https://docs.apigee.com/api-platform/troubleshoot/support).

For a list of all Apigee Edge release notes, see [Apigee Release Notes](https://docs.apigee.com/release/notes/apigee-release-notes).

## Upgrade patch

This release contains schema updates for Cassandra.

After upgrading to Edge version 4.15.01 from version 4.14.07, install this patch on top of
version 4.15.01.
You do not have to install this patch for a new install, only for an upgrade install from
4.14.07.

### Prepare

1. Upgrade Edge version 4.14.07 to version 4.15.01.
2. Unzip the opdk-patch-4.15.01.01.zip.  
   You see 2 files: patch-install, README.txt

### Install

1. On any one Cassandra nodes run the following script:  
   `> patch-install.sh -r <install_root>`  
   where \<install_root\> is the Edge installation directory, and is typically /opt.