Event Message:

The DHCP service encountered the following error while cleaning up the pending client records: code

Source Event Log Event ID Event Type
DhcpServer   1027  

Explanation:

An internal error occurred in the Dynamic Host Configuration Protocol (DHCP) service.

User Action:

Look up the indicated error in the event log in Event Viewer, and take appropriate action. Also, try running Jetpack on the database. If you continue to receive this message, you might want to restore an earlier version of your DHCP database from backup.