Conversion Tool Flags are Broken

Hi, 

in test setup, we had operator v1.2 and couchbase 6.0.2, Now i'm trying to upgrade operator to v2, after replacing crd.yaml, im executing ./cbopconv --namespace crdl , it is not execting and returning below , please let me know how to use cbopconv.

[root@k8-crdl-master bin]# ./cbopconv -namespace crdl
flag provided but not defined: -namespace
Usage of ./cbopconv:
-v Displays the version and exits
[root@k8-crdl-master bin]#