3644543 - Error message: 'Identification type BPCU01 is restricted for internal SAP usage'

When creating a Business Partner via API, the system returns the error message: "Identification type BPCU01 is restricted for internal SAP usage."

SAP S/4HANA Cloud Public Edition.

Identification type BPCU01 is only for internal purpose so this type is restricted.

• The identification type BPCU01 is reserved for SAP internal processes and cannot be used when creating or updating a Business Partner.
• If this identification type exists, it indicates that it is the BPCU01 ID of the Business Partner from another system, which is created automatically by the system

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