N1QL: password protected bucket: Auth failure seen even after editing beer-sample to have no password

1. select beer-sample during setup of couchbase on mac.
2. delete default bucket
3. create travel-sample through sample buckets.
4. Make both buckets password-protected.
5. Issue queries for union and join for beer-sample and travel-sample through curl and cbq with/without credentials, results are correct.
6. Edit travel-sample and remove password.
7. Queries in step 5 work correctly.
8. Edit beer-sample and remove password
9. Execute this simple query:
prernamanaktala@couchbases-MacBook-Pro bin $ ./cbq
No Input Credentials. In order to connect to a server with authentication, please provide credentials.
Connected to : http://localhost:8093/. Type Ctrl-D to exit.

cbq> select count as test from `beer-sample`;
{
"requestID": "9f2de946-afff-434d-b0fc-dc037e4fd6bc",
"signature":

{ "test": "number" }

,
"results": [
],
"errors": [

{ "code": 10000, "msg": "Authorization Failed Keyspace beer-sample" }

],
"status": "stopped",
"metrics":

{ "elapsedTime": "952.679µs", "executionTime": "918.185µs", "resultCount": 0, "resultSize": 0, "errorCount": 1 }

}

Same result through curl command.