Valuation Structure Change for existing item cost profile

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Hi All,

We need to change the Valuation Structure in a reimplementation project.

Cost Organization is already created with its relationships (cost books, inv. orgs.)

If I perform all the setup, I can assign the new valuation structure to the Default Cost Profile by creating a new Cost Profile and it will work for new items but the old items are valued with the old structure and as they have been transacted I can't update the old cost profile.

Another way would be creating a new cost book, which would meet our needs but the problem here is that I can't create a new cost book referenced to the Primary Ledger, so we get the following error: