[backend] Fix usage of ElasticSearch ID

[SamuelHassine]

Proposed changes

• [backend] Fix usage of ElasticSearch ID

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 65.25%. Comparing base (9faadc3) to head (eda09e4).
Report is 3 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #9727   +/-   ##
=======================================
  Coverage   65.25%   65.25%           
=======================================
  Files         630      630           
  Lines       60299    60299           
  Branches     6771     6774    +3     
=======================================
+ Hits        39347    39349    +2     
+ Misses      20952    20950    -2     

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