You cannot create specifications for authorization group &1

What causes this issue?

You attempted to create a new specification or to change the
authorization group of an existing specification (when you change the
authorization group, you actually delete the specification from the old
group and create it in a new one).
However, you are not authorized to create specifications in the
specified authorization group.

System Response

The system is unable to create the specification.

How to fix this error?

Choose an authorization group in which you can create specifications,
or cancel the dialog.

Error message extract from SAP system. Copyright SAP SE.