We have corporate PI server which is getting data from Plant PI server (Plant). In between we use PI-to-PI interface. During data cleanup process, we found there are two tags which don’t exist in Plant PI server. However, They are constantly acquiring data. After some researching, we found out that tag name and instrument tag name in Plant PI server were renamed to something else last year. However, those two tags still keep their original point id in Plant PI server. My question is why corporate PI Tag keep receiving values? Does PI-To-PI interface check configuration changes? If we need to rename a PI tag in Plant PI server, what’s the best approach we need to take so corporate PI server is aware of this change?