299006 - Agent Received an Older Configuration Format
Uploading...Agent error code #299006 occurs when an agent is newer than its server, and the server sent a configuration in a format too old for the agent to convert. The agent reports the error but the server is out of date, so upgrading the agent will not fix it.
Steps to Resolve
Upgrade the Server
Upgrade the server to a version at or above the agent's. The knoc applies on the next reconnect.
Or Roll the Agent Back
If you cannot upgrade the server yet, install an agent version closer to the server's. The server version is shown in the admin portal.
Upgrading the server before its agents avoids this error.