diff --git a/src/Data/Collection.php b/src/Data/Collection.php
index <HASH>..<HASH> 100644
--- a/src/Data/Collection.php
+++ b/src/Data/Collection.php
@@ -517,7 +517,7 @@ class Collection implements Serializable, ArrayAccess, Iterator
      */
     protected function _moveToOriginalCollection($index)
     {
-        if (array_key_exists($index, $this->_originalCollection)
+        if (!array_key_exists($index, $this->_originalCollection)
             && !in_array($index, $this->_newKeys)
         ) {
             $this->_originalCollection[$index] = $this->_COLLECTION[$index];
create Collection class (issue #4)

This version introduces multiple enhancements:

fixed move collection element to original collection

Details of additions/deletions below:
--------------------------------------------------------------

Modified:   Data/Collection.php
            -- Updated --
                _moveToOriginalCollection added negation for array_key_exists