Using renaming tool, you can to rectify/change multiple document ids at once. This tool is only accessible to the User who has System Manager role assigned.
You can rename ids of upto 500 records at a time. Following are step to bulk rename bulk records. Let's assume we are renaming Item Codes for the existing items.
Step 1: Open Excel File
In a spreadsheet file, enter old Item IDs in the first column, and new Item Ids in the second column. Save spreadsheet file in a CSV format.
Step 2: Upload Data File
To upload data file go to,
Setup > Data > Rename Tool
Select DocType which you want to rename. Here DocType will be Item. Then Browse and Upload data file.