New credential values match named Crediential

通过cloud control 12c添加agent时，用户验证出现如下错误：

Create New Named Credential:
New credential values match named Crediential the _new_credential_name OWNED BY user, consider using named credential


解决办法：
/u01/em_cloud/oms/bin/emctl set property -name  oracle.sysman.core.security.credstore.show_warning_on_dupes -value false

MOS上说要从其oms，实际测试不需要。