diff --git a/devops-service/workers/stack_bootstrap/stack_servers_persister.rb b/devops-service/workers/stack_bootstrap/stack_servers_persister.rb
index 30ada1f..d07bd7d 100644
--- a/devops-service/workers/stack_bootstrap/stack_servers_persister.rb
+++ b/devops-service/workers/stack_bootstrap/stack_servers_persister.rb
@@ -14,16 +14,17 @@ class StackServersPersister
 
   # returns: {  priority_as_integer => [Servers] }
   def persist
-    puts_and_flush 'Start syncing stack servers with CID'
-
+    puts_and_flush 'Start saving stack servers into CID database.'
     stack_servers_with_priority = {}
-    stack_servers_info.each do |priority, info_array|
-      stack_servers_with_priority[priority] = info_array.map do |info_hash|
-        out.puts "Instance '#{info_hash["id"]}' has been launched with stack."
-        persist_stack_server(info_hash)
-      end
+
+    @provider.stack_servers(stack).each do |provider_info|
+      server = persist_stack_server(provider_info)
+      priority = provider_info['tags']['cid:priority'].to_i
+      stack_servers_with_priority[priority] ||= []
+      stack_servers_with_priority[priority] << server
     end
-    puts_and_flush "Stack servers have been synced with CID"
+
+    puts_and_flush "Stack servers have been saved."
     stack_servers_with_priority.each do |priority, servers|
       out.puts "Servers with priority '#{priority}': #{servers.map(&:id).join(", ")}"
     end
@@ -33,15 +34,6 @@ class StackServersPersister
 
   private
 
-  # returns: {priority_as_integer => array_of_sersvers_info}
-  def stack_servers_info
-    stack_servers = @provider.stack_servers(stack)
-    stack_servers.each do |info|
-      info['tags']['cid:priority'] = info['tags']['cid:priority'].to_i
-    end
-    stack_servers.group_by{|info| info['tags']['cid:priority']}
-  end
-
   # takes a hash, returns Server model
   def persist_stack_server(server_info)
     server_attrs = {