Sharepoint event receiver and save conflict

Question

Event in question is item added event, and I am updating (systemupdate) same item multiple times.

Behind the scene:

1. Site is multilingual (English,french,spanish)
2. List item variation propagation is enabled, so I believe event receiver will fire multiple times once with w3wp process, and twice with owstimer.(Correct me if I am wrong)
3. Sole purpose of event receiver is to break the role inheritance of list item and reassign some permissions after iterating through site groups.

code:

try
                {
                    this.EventFiringEnabled = false;
                    string siteurl = properties.WebUrl;
                    SPListItem _currentItem = properties.ListItem;
                    int itemid = _currentItem.ID;

                    SPSecurity.RunWithElevatedPrivileges(delegate()
                    {
                        using (SPSite site = new SPSite(siteurl))
                        {

                            using (SPWeb web = site.OpenWeb(properties.ListItem.Web.ID))
                            {  
                                if (properties.ListItem.ModerationInformation != null && properties.ListItem.ModerationInformation.Status == SPModerationStatusType.Approved && properties.ListItem.Level == SPFileLevel.Published)
                                {    
                                    web.AllowUnsafeUpdates = true;
                                    SPList myList = web.Lists.TryGetList("listName");
                                    SPListItem item = myList.GetItemById(itemid);

                //fetch some values from item object

                                    foreach (string value in collection)
                                    {
                                        if (!item.HasUniqueRoleAssignments)
                                          {
                    //break item role inheritance
                                            item.SystemUpdate(false)
                                          }

                                       //logic to add permissions to the item 
                                       item.SystemUpdate(false)
                                       // there are n number of permissions so item.systemupdate is called multiple times
                                       //logic to add permissions to the item 
                                       item.SystemUpdate(false)
                                       //logic to add permissions to the item 
                                       item.SystemUpdate(false)
                                       //logic to add permissions to the item 
                                       item.SystemUpdate(false)
                                    }

Event Firing is disabled at the start of event receiver but still sometimes I found it to true at the later stage.

Item I am updating is on the same list on which the event receiver is firing.

I am getting save conflict errors at various item.SystemUpdate()

Please suggest!

Answer 1

You may need to get a new reference to the item after each update:

// code before first update
item.SystemUpdate(false);
item = myList.GetItemById(itemid); // get new reference

// next bit of logic here...
// ...
item.SystemUpdate(false);
item = myList.GetItemById(itemid);

// etc, etc