I believe the restriction applies to current certificate older. Why your situation is definitely an edge case, you will not be certified SSCP on October 25th so you should be eligible to sit for the CC exam.
That said, the CC is targeted at individuals with no cyber security background while the SSCP requires several years of experience. The expectation, as far as I understand it, is for people with the CC to start their journey and eventually move to the other certifications.
From a personal perspective you're adding $50 to your AMFs without real perceivable gain.
Sic semper tyrannis.