Kibana Terms panel: How to group similar values

Hi,

I used the ELK stack to monitor an error log. Using Kibana, I want to see
the top errors (count) that are occuring, but I want similar errors to be
regroup. For example, among all errors, I have these similar errors:

Encountered positional parameter near line 1, column 51. Positional
parameter are considered deprecated; use named parameters
Encountered positional parameter near line 3, column 81. Positional
parameter are considered deprecated; use named parameters
Encountered positional parameter near line 2, column 27. Positional
parameter are considered deprecated; use named parameters
...

They differ slightly, but I want them regroup in my "Top errors panel".
This is one example, but I also have other kind of errors that are almost
identical and want to regroup.

Is there a way to do that?

Thank you
Nicolas

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