FA-How we can use merge or split functionality even after CIP asset creation & post in FA.

We have scenarion where one AP invoice having 10 lines & business is not sure if it will 10 asset for 10 lines or 10 lines in to 5 asset, in that case if business created 10 lines with 10 CIP asset & CIP asset type created, hence, during capitalization business got to know that this 10 lines should be either one line of one asset or 10 lines of 5 asset, then how business will manage this before capilization when they got to know that we should not have 10 CIP asset then how can merge or split the