TestComplete uses mapped names and aliases to address objects in tests. If you change the mapped name or alias in the Name Mapping repository, you need to update your tests to address the object using its new name. TestComplete shows this message suggesting that you update your keyword tests to use the new name automatically.
Click Yes to update your keyword test to use the new name. TestComplete will update all On-Screen Action operations and all operation parameters that refer to the object in the Onscreen Object mode. 
TestComplete will not update the object name in code snippets and code expressions that your keyword tests use. It will not update your script tests either. You will have to update them manually.
Click No not to update the tests to use the new name.