How to remove reference field value after delete its reference node Let say, I have 2 nodes.
In first node, I add a reference to an existing node, e.g. Test node [nid:2];   I delete the referenced node. When I edit the first node,the reference field shows [nid:2]. 

How can I make that reference field empty, once the referenced node is deleted?
Try using Reference Delete module..

Project page says


  Deletes values in reference fields created with Entity Reference or
  References when the referenced entity is deleted.