Not able to change the Master Organization of a Material Item on the Manage Resource Class setup.

Hi,

We are currently trying to change the Master Organization of a Material Item on the Manage Resource Class setup page.
Our requirement is to create a budget at the item level, for which we need to use items in the Resource Breakdown Structure (RBS). However, items are only available in the RBS when they belong to the Master Organization selected on the Resource Class setup page.
At present, we need to change this Master Organization, as all our required items belong to a different Master Org. However, when attempting to change the organization, we are encountering the following error: