License code error

[umasankar.t (umasankar)]

I am getting this error Kindly help.

Activation failed with error: 0
Error description: Cannot use Community Edition on this machine after activating a trial or Enterprise license code. Please enter a valid license key.
License status: Device ID already activated

Device ID: t9AHRvbrvZJTnsXNErYY
Computer: LTPCHE082284712
User Name: UMASANKAR.T

email : umasankar.t@mphasis.com