# CiviCRM 5.9.1

Released January 16, 2018

- **[Synopsis](#synopsis)**
- **[Bugs resolved](#bugs)**
- **[Credits](#credits)**
- **[Feedback](#feedback)**

## <a name="synopsis"></a>Synopsis

| *Does this version...?*                                         |         |
|:--------------------------------------------------------------- |:-------:|
| Fix security vulnerabilities?                                   |   no    |
| **Change the database schema?**                                 | **yes** |
| Alter the API?                                                  |   no    |
| Require attention to configuration options?                     |   no    |
| Fix problems installing or upgrading to a previous version?     |   no    |
| Introduce features?                                             |   no    |
| **Fix bugs?**                                                   | **yes** |

## <a name="bugs"></a>Bugs resolved

- **[dev/core#660](https://lab.civicrm.org/dev/core/issues/660) Fatal DB Error:
  already exists on event registration/contribution pages when profile has user
  creation ([Backport
  13451](https://github.com/civicrm/civicrm-core/pull/13451))**

  In CiviContribute and CiviEvent, this fixes a crash on the payment page
  affecting anonymous users in certain ACL configurations.  The change relaxes a
  foreign-key constraint.

- **Fix broken case activity date filter #13449
  ([Backport 13449](https://github.com/civicrm/civicrm-core/pull/13449))**

## <a name="credits"></a>Credits

This release was developed by the following authors and reviewers:

Wikimedia Foundation - Eileen McNaughton; Nicol Wistreich; CiviCRM - Tim
Otten, Coleman Watts; Circle Interactive - Dave Jenkins; Australian Greens -
Seamus Lee

## <a name="feedback"></a>Feedback

These release notes are edited by Tim Otten and Andrew Hunt.  If you'd like to
provide feedback on them, please login to https://chat.civicrm.org/civicrm and
contact `@agh1`.