#31 Deletion of contacts from Outlook to Gmail does not work

[Anonymous]

[2/7/2012 3:05:31 PM | Error] System.Exception: Failed to synchronize contact: yyyyy.
Please check the contact, if any Email already exists on Google contacts side or if there is too much or invalid data in the notes field.
If the problem persists, please try recreating the contact or report the error on SourceForge:
Execution of request failed: https://www.google.com/m8/feeds/contacts/xxxxx@gmail.com/full/67a8c8940a5783bd ---> Google.GData.Client.GDataRequestException: Execution of request failed: https://www.google.com/m8/feeds/contacts/xxxxx@gmail.com/full/67a8c8940a5783bd ---> System.Net.WebException: The remote server returned an error: (412) Precondition Failed.
at System.Net.HttpWebRequest.GetResponse()
at Google.GData.Client.GDataRequest.Execute()
--- End of inner exception stack trace ---
at Google.GData.Client.GDataRequest.Execute()
at Google.GData.Client.GDataGAuthRequest.Execute(Int32 retryCounter)
at Google.GData.Client.GDataGAuthRequest.Execute()
at Google.GData.Client.Service.Delete(Uri uriTarget, String eTag)
at Google.GData.Client.FeedRequest`1.Delete[Y](Y entry)
at GoContactSyncMod.Syncronizer.SaveContact(ContactMatch match) in C:\Users\saller\projects\googlesyncmod\trunk\GoogleContactsSync\Syncronizer.cs:line 1006
at GoContactSyncMod.Syncronizer.SaveContacts(List`1 contacts) in C:\Users\saller\projects\googlesyncmod\trunk\GoogleContactsSync\Syncronizer.cs:line 870
--- End of inner exception stack trace ---
[2/7/2012 3:05:31 PM | Information] Sync complete.
Synced: 3 out of 1122.
Deleted: 0.
Skipped: 0.
Errors: 1.