title: How to combine 2 fiels with different names but same value in Kibana
body: <p>I set up a ELK environment with 2 different indices(index) streams. both streams have a field with the same value but the filed name is different.
  is there a possibility to merge them or something like that so when  i use the Kibana filter it shows me the value from both filed.</p>
  
  <p>so i can set up visualizations, but when i filter on stream 1, the visualization of stream 2 is empty.</p>
  
  <p>i also tried to name the indedx the same, but did not help.</p>
  
  <p>Example:
  index1 fieldname information.ID = 123
  index2 fieldname ID = 123</p>
  
  <p>i want to use the filter on both streams</p>