Prevent non allowed metadata deletion

Codecov Report

Merging #597 into master will increase coverage by 0.02%. The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #597      +/-   ##
==========================================
+ Coverage   85.45%   85.48%   +0.02%     
==========================================
  Files         221      221              
  Lines       13338    13362      +24     
==========================================
+ Hits        11398    11422      +24     
  Misses       1940     1940

Impacted Files	Coverage Δ
arkindex/documents/serializers/light.py	100% <100%> (ø)
arkindex/documents/tests/test_metadata.py	100% <100%> (ø)
arkindex/documents/api/elements.py	97.79% <100%> (+0.02%)

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added 1 commit

• 56d4758a - linting

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resolved all threads

added 1 commit

• 548388ab - Suggestions

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merged

mentioned in commit 47bc06e2