If the name mapping no longer references the UI Object, then you'll have to update the name mappings.
See Update Name Mapping for options
So, is there any script can we run directly so that all name mapping will get updated in case of environment upgrade ?
If you're going to have frequent environment changes, then you need to put your environment values in variables and use those variables to reference the objects that change instead of having them be directly in the code. Then all you have to change each time is that set of variables.
Unfortunately not. It is something that you have to do manually. Usually, when there's a major version change with the supported development tools, the application internal objects ID changes too - but not in all cases.
