Fixed repeated validation errors when duplicate entries are detected

[chrismaddalena]

Fixed #529

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.85%. Comparing base (88ef6a4) to head (8589bfb).
Report is 2 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #530   +/-   ##
=======================================
  Coverage   91.85%   91.85%           
=======================================
  Files         319      319           
  Lines       18569    18573    +4     
=======================================
+ Hits        17056    17060    +4     
  Misses       1513     1513           

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