Translate filter not working for numbers extracted through Regular Expression

[Hans]

Hi, I have difficulties with a filed that I extracted from a long number to lookup with the translate filter.

Here is the initial number:
649032011715511

However I only require the last 5 digits and extract these with the following filter:
grok { match => ["CELL_ID_LONG", "(?<CELL_ID>\d{5})$"] }
Now I get:
15511

This number I now would like to run through the translate filter however it is not returning the value, here is the filter:
translate { field => "Cell_ID" destination => "S_Name" dictionary_path => "/etc/logstash/conf.d/translate/name1.yaml" add_tag => [ "PRESENT" ] }

I have also tried to convert the number to an integer:
mutate { convert => { "CELL_ID" => "integer"} }

This also did not work, the name1.yaml file looks as follows:
... "15511": Ford ...

Could someone kindly assist in trying to identify why the translate filter is not working when using the regular expression to extract the digits and lookup the value?

[Christian_Dahlqvist]

@Hans

field => "Cell_ID"

Here is says Cell_ID with some lower case letters but in other places you refer to it as CELL_ID in all capitals. Which should it be?

[Hans]

Thank you very much @Christian_Dahlqvist it is appreciated