Logstash index pattern error

Hello Team,

could you please advise why data view cannot be created?

conf entry
input {
file {
start_position => "beginning"
path => "/data/KONG1/mm_bl.log"
sincedb_path => "/dev/null"
}
}
filter {
json {
source => "message"
}
}

filter {
grok {
match => {"message" => "%{GREEDYDATA:hibernate}\n%{GREEDYDATA:hibernate}%{TIMESTAMP_ISO8601:timestamp}"}
}
}

output {
elasticsearch {
hosts => "https://es1.innov.mt:9200"
index => "mm-bl-%{+yyyy.MM.dd}"
ssl => true
ssl_certificate_verification => false
cacert => "/etc/kibana/innov_mt.crt"
user => "mfslog"
password => "Yaxtubular6"
}
stdout {}
}

Thanks,

Roshan

The index option is ignored by default.