Query: Process is started with Admin User who can upload upto 5 documents, the documents can be downloaded in the reviewer task pages, however if the Admin doesn't upload the documents then the reviewer also should be able to upload the documents

Query: Process is started with Admin User who can upload upto 5 documents, the documents can be downloaded in the reviewer task pages, however if the Admin doesn’t upload the documents then the reviewer also should be able to upload the documents.
When we try to implement this, its giving us the error saying two same variable cant be used.

Can anyone has implemented similar?