Add call to graphql_enum_key in replicator.rb

ee/app/models/geo/base_registry.rb

@@ -91,7 +91,7 @@ def self.graphql_mutable?
     true
   end
 
-  # Method to generate a GraphQL enum key based on registery class.
+  # Method to generate a GraphQL enum key based on registry class.
   def self.graphql_enum_key
     self.to_s.gsub('Geo::', '').underscore
   end

ee/lib/gitlab/geo/replicator.rb

@@ -96,8 +96,8 @@ def self.graphql_field_name
 
       # @return [String] GraphQL mutation registry class used by registry_class_enum.rb. E.g. "PACKAGE_FILE_REGISTRY"
       def self.graphql_mutation_registry_class
-        "#{self.replicable_name}_registry".upcase
-      end
+        self.registry_class.graphql_enum_key.upcase
+      end      
 
       # Return the registry related to the replicable resource
       #