HP Switch Error_1900 series

[India_Sam]

Hi there,

Am getting below error on my HP procurve switch. Kindly help me how to solve it..

%Apr 23 23:11:56:556 2000 SWV1_10.10.11.5 MSTP/3/AGEDOUT:- 1 -The stp info of Instance 0's Ethernet1/0/9 has aged out because of not receiving message!
%Apr 23 23:11:56:557 2000 SWV1_10.10.11.5 MSTP/3/AGEDOUT:- 1 -The stp info of Instance 0's Ethernet1/0/18 has aged out because of not receiving message!

[SWV1_10.10.11.5]display stp interface Ethernet 1/0/9

----[CIST][Port9(Ethernet1/0/9)][DISCARDING]----
Port Protocol :enabled
Port Role :CIST Backup Port
Port Priority :128
Port Cost(Legacy) :Config=auto / Active=200
Desg. Bridge/Port :32768.c4ca-d95d-feee / 128.9
Port Edged :Config=disabled / Active=disabled
Point-to-point :Config=auto / Active=true
Transmit Limit :10 packets/hello-time
Protection Type :None
MSTP BPDU format :Config=auto / Active=legacy
Port Config
Digest Snooping :disabled
Num of Vlans Mapped :1
PortTimes :Hello 2s MaxAge 20s FwDly 15s MsgAge 1s RemHop 20
BPDU Sent :104615
TCN: 0, Config: 0, RST: 0, MST: 104615
BPDU Received :104615
TCN: 0, Config: 0, RST: 0, MST: 104615