This screenshot shows what it looks like when a client has an old WiFi password. This is a Wemo smart plug that keeps trying to use the old WiFi password and can’t get past the Handshake #2 in the WPA2 security. Notice all of the Handshake #1 packets coming from the access point and then some Handshake #2 packets being sent from the Wemo. There are also a few Deauth packets sent from the access point with the reason code “previous authentication no longer valid.”
