Template &1, node &2: More than one attribute exists for ContentURL

What causes this issue?

If you want to use binary content in DPS it is only possible to use URLs
to reference this content. In this case there are further restrictions
as there should be only one attribute referencing an URL per node.
Moreover a pair of attributes is needed: one referencing the URL and
another giving the correct mime type of the content. The attribute for
the URL needs to have the "ContentURLIndicator" set to true and must be
of datatype string. The latter is also true for the mime type attribute
which is designated to be a mime type by using the semantics code
"MimeType".

System Response

Only one attribute per node is allowed to be marked for being the
ContentURL attribute as described above.

How to fix this error?

Change the model so that only one attribute is marked for being the
ContentURL.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.