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]