ReRun failed tests

Hello, 

Is there a way to clear the current test item log from script, before test run is completed? Why do I need this? By using the first re-execution script on this page, the log comes back with errors even if on the second execution the test ran without errors, because the log also keeps the logs for the first execution of the test, which contained errors. Am I making sense? Can I somehow fix this? 

Thank you, 

Andrei