Hello Piyush,
If Move action used under Utility - File Manipulation, that will rename the existing file with new name.
If you want to rename the file in same location then, you can use the ""Copy"" action under ""Utility - File Manipulation"" VBO and give the source path and destination path with file name to which you would like to rename.
Please find an attachment.
Thanks & Regards,
Vijay Rudrappa Dodamani