Fixes the error "namespace x is already loaded"

[brynrhodes]

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[codecov]

Codecov Report

Attention: Patch coverage is 0% with 6 lines in your changes missing coverage. Please review.

Project coverage is 67.38%. Comparing base (6e14c44) to head (f3d2dba).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
...rc/main/java/org/opencds/cqf/fhir/cql/Engines.java	0.00%	6 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #523      +/-   ##
============================================
- Coverage     67.40%   67.38%   -0.02%     
  Complexity     4141     4141              
============================================
  Files           355      355              
  Lines         18169    18174       +5     
  Branches       2804     2805       +1     
============================================
  Hits          12246    12246              
- Misses         4713     4718       +5     
  Partials       1210     1210              

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