> For the complete documentation index, see [llms.txt](https://help.security.gallagher.com/knowledge-hub/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.security.gallagher.com/knowledge-hub/command-centre-releases/release-history/unsupported-gallagher-command-centre-versions/command-centre-8.90-releases/8.90-maintenance-release-4.md).

# 8.90 Maintenance Release 4

Enhancements in this version are as follows. 

<table><thead><tr><th width="147">Tech Ref</th><th width="482">Description</th><th width="213">Component</th></tr></thead><tbody><tr><td>135690</td><td>Security Enhancement</td><td>Controller</td></tr></tbody></table>

&#x20;Bug fixes in this version are as follows.&#x20;

<table><thead><tr><th width="109">Tech Ref</th><th width="510">Description</th><th width="183">Fixed In</th></tr></thead><tbody><tr><td>135198</td><td>VM client Locked for Editing Visitors</td><td>VM Client</td></tr><tr><td>136064</td><td>Error when editing Cardholder (Cards) with PIN assigned after Use PINs (Card Type) was disabled</td><td>Server</td></tr><tr><td>136257</td><td>DVR Configuration Tab - system type dropdown greyed out</td><td>Config Client</td></tr><tr><td>136259</td><td>Wrong DNS servers inherited from server on controller 6000 when server address is a FQDN</td><td>Server/Controller</td></tr><tr><td>136338</td><td>DVR dropdown is not clickable after 9.00 upgrade (Avigilon integration)</td><td>Server</td></tr><tr><td>136384</td><td>Unable to create DVR System - with a System Type - GENERIC.</td><td>Server</td></tr><tr><td>137881</td><td>SIP Video Issue on Command Centre Client’s Intercom Viewer</td><td>Client</td></tr><tr><td>138022</td><td>The intercom viewer displays the correct camera associated with the intercom but not with Site Plan</td><td>Client</td></tr><tr><td>138257</td><td>Auto-Generated PDF not assigning IDs for existing unique pdf</td><td>Server</td></tr><tr><td>140041</td><td>Security Patch</td><td>Controller</td></tr><tr><td></td><td></td><td></td></tr></tbody></table>


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