How should we edit the Actual result of the test cases which is already executed in test set

Let me explain clear 

Round 1 testing 

I have a test set of 10 cases 

Executed 10 test cases out of 10 , 1 case is failed 

I have wrongly updated Actual result 

Test set run successfully completed 

Now i would like to edit the actual result to make the correction 

Can you please explain the process how to change with clear steps ( Video type )