RHEL 8, RH124, Chapter 9, Section 3 (Listing Unit Dependencies) has an error. It is is this:
The problem is that the example is incorrect. In RHEL 8 no warning message is seen. Additionally, cups.socket and cups.path are stopped along with cups.service, as seen here:
(The warning message appears in RHEL 7.)
The example should be changed. Perhaps the reverse scenario would work, which would actually fit the explanation better. In other words, if cups.service is stopped (as seen above), and then cups.path is started, cups.service will also be started -- as seen below:
