arangosh> a1 = db.example.insert({ a : 1 }); { "_id" : "example/1094375879", "_rev" : "1094375879", "_key" : "1094375879" } arangosh> a2 = db._replace(a1, { a : 2 }); { "_id" : "example/1094375879", "_rev" : "1094572487", "_key" : "1094375879" } arangosh> db._remove(a1); [ArangoError 1200: precondition failed] arangosh> db._remove(a1, true); true arangosh> db._document(a1); [ArangoError 1202: document not found]