I updated and or completed my VCP Datacenter 2020 and VCIX Datacenter 2020 late last year.  I'm planning on pursuing my VCDX DCV and seeing now that there's a VCDX DCV 2021. 

Are the 2020 certifications no longer a valid pre-req for the VCDX?  If not,  will I be required to pass a exam or take a course to update my 2020 certs to 2021 in both VCP and VCAPs before applying for my VCDX?