Add an association to a data type model to property model &2

What causes this issue?

Model &v2& of software component &v1& represents the property in
classification. A property model must have a property data type model
assigned by an association. The property data type model contains all
the technical settings of the properties and the list of valid values.

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?

Create an association from the property model root node to the property
data type model root node. If the latter template does not exist, you
have to create it first (with root node and nodes for descriptions,
values, and value descriptions).

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.