One of my colleagues passed the CCSA R80 exam two years ago. It'll expire tomorrow and he plans to do the CCSE R80 next week. He asked me if his then-expired CCSA R80 would be an issue.
So I checked with the Check Point Certification FAQ - Updated December 2018
However, I couldn't find any note about the expected status of required prerequisite (CCSA R80).
Valeri's understanding is correct.
A candidate with an expired CCSA is eligible for the CCSE of the same version.
Regards,
Tug