shell> curl -X DELETE --header 'If-Match: "_XG3z-Km--_"' --dump - http://localhost:8529/_api/document/products/10551
HTTP/1.1 412 Precondition Failed
x-content-type-options: nosniff
content-type: application/json; charset=utf-8
etag: "_XG3z-Ki--_"
{
"error" : true,
"code" : 412,
"errorNum" : 1200,
"errorMessage" : "precondition failed",
"_id" : "products/10551",
"_key" : "10551",
"_rev" : "_XG3z-Ki--_"
}