Document does not correspond to BPML &. Import canceled

What causes this issue?

The BPML document has different versions. The versioning does not take
place by means of a version number, but a namespace (see www.bpmi.org).
The BPML data to be imported is not supported by the import converter.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Check the namespace / targetNamespace und xmlns= ".." in the element
<package>.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.