In logging on a 1200 series AP on 12.3(2)JA2, I'm seeing the following error message:
DOT11-6-DISASSOC: Interface Dot11Radio0, Deauthenticating Station 000c.f14c.ffbb Reason: Previous authentication no longer valid
But the client (000c.f14c.ffbb) is in the same room as the AP, doing WPA authentication. It keeps disconnecting randomly with no obvious reason why. What are all of the possible reasons why I would see this error message?