xcode - Updating objects on parse - [Error] object not found -

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i trying update object on parse, error message: [error]: object not found update (code: 101)

let query = pfquery(classname: "answers")     query.findobjectsinbackgroundwithblock { (objects, error) -> void in         if let objects = objects {             object in objects {                     object["upvoters"] = ["one","two"]                     object.saveinbackground()             }         }     }

what causing this, , how fix it?

the cause of issue acl settings of object trying edit. trying edit object wasn't created me, , acl did not have public write access true. see parse acl


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