What does it mean when a judge wants to review the case after its been closed and ruled on?

The case is a 15 year old case from 2008. Person was sentenced to 20 years served 12 years in prison and was supposed to do the remainder on probation. Person violated and had to go back in court. The attorney got a re-deal of 17 years with gideon time and times served in the county. Now after roughly 5 and half months after the case is closed and person sent off to prison the judge wants to review the case no one notified on our end. We just followed up on the case and found out through clerk of court the judge wants to review the case but no other information was given.