Is there a way query 2 indx base on their same field?

for example
index 1 has field
A error_code:value
B error_group:value
index 2 was imported from a csv file which includes the explanation for those error logs

so what I want to achieve is based on the index1 ' error code and group to find the index 2's explanation, is it possible to use elastic stack to do that?

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