Having an issue with Quickbook Salesforce integration: Refresh token is getting changed after 8 hrs?

"fault":{"error":[{"message":"message=AuthenticationFailed; errorCode=003200; statusCode=401","detail":"Token expired: AB34343434343ohY7hoMjqcbDQ7efBA4tPuRw9ywAc14jo5S4c","code":"3200","element":null}],"type":"AUTHENTICATION"}

This is the error I'm getting. I think I'm not getting the renewed refresh token after 8 hrs. It is actually scheduled now for every 10 mins too.