# CiviCRM 5.5.1
Released September 12, 2018
- **[Synopsis](#synopsis)**
- **[Bugs resolved](#bugs)**
- **[Credits](#credits)**
- **[Feedback](#feedback)**
## Synopsis
| *Does this version...?* | |
|:--------------------------------------------------------------- |:-------:|
| Fix security vulnerabilities? | no |
| Change the database schema? | no |
| Alter the API? | no |
| Require attention to configuration options? | no |
| **Fix problems installing or upgrading from previous version?** | **yes** |
| Introduce features? | no |
| **Fix bugs?** | **yes** |
## Bugs resolved
- **([dev/core#390](https://lab.civicrm.org/dev/core/issues/390))
Smart groups created before 5.5.0 using "relation_permission" break on upgrade
to 5.5.0 ([12803](https://github.com/civicrm/civicrm-core/pull/12803))**
## Credits
This release was developed by the following authors:
Australian Greens - Seamus Lee; CiviCRM - Tim Otten; Lemniscus - Noah Miller;
Wikimedia Foundation - Eileen McNaughton
## Feedback
These release notes are edited by Tim Otten and Andie Hunt. If you'd like to
provide feedback on them, please login to https://chat.civicrm.org/civicrm and
contact `@agh1`.