Fix entities duplicate key violation

[steven-sheehy]

Detailed description:

Which issue(s) this PR fixes:
Fixes #483

Special notes for your reviewer:

Checklist

• Documentation added
• Tests updated

[codecov]

Codecov Report

Merging #484 into master will decrease coverage by 0.03%.
The diff coverage is 100%.

@@             Coverage Diff              @@
##             master     #484      +/-   ##
============================================
- Coverage     60.68%   60.64%   -0.04%     
+ Complexity      101      100       -1     
============================================
  Files            78       78              
  Lines          2673     2673              
  Branches        341      341              
============================================
- Hits           1622     1621       -1     
  Misses          899      899              
- Partials        152      153       +1

Impacted Files	Coverage Δ	Complexity Δ
...irror/importer/parser/record/RecordFileLogger.java	83.72% <100%> (ø)	0 <0> (ø)	⬇️
...era/mirror/grpc/listener/PollingTopicListener.java	93.75% <0%> (-3.13%)	11% <0%> (-1%)

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[Nana-EC]

LGTM