| Message Code | PIX-3-210003 |
| Severity | Error |
| Description | Unknown LU Object number |
| Explanation | Stateful Failover received an unsupported Logical Update object and therefore was unable to process it. This could be caused by corrupted memory, LAN transmissions, and other events. |
| User Action | If you see this error infrequently, then no action is required. If this error occurs frequently, check the Stateful Failover link LAN connection. If the error was not caused by a faulty failover link LAN connection, determine if an external user is trying to compromise the protected network. Check for misconfigured clients. |
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