Changing log level throws error ERR_APP_ALREADY_DEPLOYED

./testrunner -i vikas-nodes.ini -t eventing.eventing_settings.EventingSettings.test_eventing_with_changing_log_level_repeatedly,nodes_init=4,services_init=kv-eventing-index-n1ql,dataset=default,groups=simple,reset_services=True,skip_cleanup=True,doc-per-day=3 

Exception: {

 "name": "ERR_APP_ALREADY_DEPLOYED",

 "code": 20,

 "description": "Function already deployed",

 "attributes": null,

 "runtime_info": {

  "code": 20,

  "info": "Function: Function_930582679_test_eventing_with_changing_log_level_repeatedly another function with same name is already deployed, skipping save request"

 }

}