Strange error with gsub

Elastic Stack Logstash
1

I have my mutate config
mutate {
gsub => [
"service","\x7f\\",""]
}

I want to replace "DEL" string with NULL. But look likes it misunderstands with my escape.

2

That escape sequence isn't supported.

https://www.elastic.co/guide/en/logstash/6.3/configuration-file-structure.html#_escape_sequences

3

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