Superpackage '&2' is not contained in the ACL of package interface '&1'

What causes this issue?

The superpackage '&V2&' is <ZH>not</> contained in the 'List of Client
Packages' (<ZK>Access Control List</>, ACL) of the Package Interface '
&V1&' . For this reason, the package interface is not visible for the
superpackage and cannot be propagated in a package interface of the
superpackage.

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?

Include the '&V2&' package in the 'List of Client Packages' of the
package inteface '&V1&' .

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.