arangosh> a1 = db.example.insert({ a : 1 }); { "_id" : "example/14885", "_key" : "14885", "_rev" : "_UWy-J32---" } arangosh> a2 = db._replace(a1, { a : 2 }); { "_id" : "example/14885", "_key" : "14885", "_rev" : "_UWy-J36---", "_oldRev" : "_UWy-J32---" } arangosh> db._remove(a1); [ArangoError 1200: precondition failed] arangosh> db._remove(a1, {overwrite: true} ); { "_id" : "example/14885", "_key" : "14885", "_rev" : "_UWy-J36---" } arangosh> db._document(a1); [ArangoError 1202: document not found]