Duplicate asset number already existing on multiple corp book Getting error while adding to Tax book

Summary:

Hi - We are working on copying assets assigned to a corp book to newly created tax books. We came across a scenario where the same asset number already exists and is assigned to multiple corporate books. Of the 5 corporate books, it is assigned to only 1 asset book has an NBV available. Now when we try to load this asset to the Tax book we are getting an error 'The asset number 'XXXX' already exists. Enter a unique asset number. (FA-645197).' Please let us know how to tackle this. This is a goodwill intangible asset and has a