SAP Message B0440 - Real Estate BP &1 used as SAP BP --> Do not use in RE Classic

Diagnosis You are trying to change a Real Estate Business Partner whosecorresponding SAP Business Partner is currently being used in a SAP BPapplication. As parallel maintenance between the Real Estate Business Partner (TR BP)and the SAP Business Partner is no longer available in this release,converting this partner could lead to data being lost in SAP BP. You aretherefore not allowed to convert this partner. You are not allowed touse the partner in the application RE Classic. For further information, see note 687037.