ResourceAlreadyExistsException

Hi,
For my testing, I created index frh-logstash-000002 yesterday and I created frh-logstash-000003 today.

After frh-logstash-000003 gets created today, it returned "1 index has lifecycle errors" on frh-logstash-000002.

Index lifecycle error
resource_already_exists_exception: index [frh-logstash-000003/mTkuVbhrTkCgjL4aeo0hFA] already exists

I don't understand why such error occurred? If it already exists, it wouldn't allow me to create the index in the first place. How do I get rid of this error?

Thanks,
Farah