For Dell EMC VSI 8.0 to work on a VMAX All Flash array, a minimum required microcode version is necessary. The microcode version 5977.1131.1131 is the correct requirement for ensuring compatibility and optimal performance with these systems. While other versions like 5977.1125.1125 might exist, the key requirement here is the specific microcode version mentioned, which ensures that the array can support Dell EMC VSI 8.0 features and functionalities.