clearing preferred credential using emcli but still visible in oms console

Hello,

we're using OEM 13.5

I'm clearing preferred host credential using emcli

emcli clear_preferred_credential -target_name=

Successfully cleared preferred credentials for target hostname.domain.com:host.

But whe I look at oms console

setup --> security --> preferred credentials --> host --> Manage Preferred Credentials

the credential is still set.

same when I set a new credential for a host.

emcli set_preferred_credential -set_name=HostCredsNormal -target_type=

Successfully set preferred credentials for target hostname.domain.com:host.

setup --> security --> preferred credentials --> host --> Manage Preferred Credentials

credential is not set .

what I'm doing wrong ?