Logstash. Mutate's split doesn't split string

[ThreatInter (Threat)]

Hi, community. I have field "temp" with this value: "2.4.3-371989". I want split it by dots. With this purpose I use mutate filter this way:

mutate {
  split => ["temp", "."]
}

But after split "temp" field still equals "2.4.3-371989".

[Cad]

Hi,

Split option take a Hash not an Array.
Need to be like this :

mutate {
  split => { "temp" => "." }
}

Cad.