It is general practice if we assigned a new property for the members, the old property will be automatically replaced or deleted by the new one. No need to change or edit the property in input file for members one by one.

But for some large file I am facing lots of problems for member duplicated. After assigning new member properties there are showing duplicated member property and showing warning.

I think within the new version or in total version there are some internal errors or have some bugs. This is required to clean the bugs or else to resolve the issue permanently.

As we are facing lots of problem, I think you must re-check the issue to resolve it permanently.