ios9 -“尝试删除和重新加载相同的索引路径”

This is an error:

这是一个错误:

CoreData: error: Serious application error. An exception was caught from the delegate of NSFetchedResultsController during a call to -controllerDidChangeContent:. attempt to delete and reload the same index path ( {length = 2, path = 0 - 0}) with userInfo (null)CoreData: err