better handling of non existent versions

[pigmej]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 57.14286% with 3 lines in your changes missing coverage. Please review.

Project coverage is 54.28%. Comparing base (f313633) to head (4bbfddb).
Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
src/partial_quicksync.rs	57.14%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #57      +/-   ##
==========================================
- Coverage   54.36%   54.28%   -0.09%     
==========================================
  Files          11       11              
  Lines         309      315       +6     
==========================================
+ Hits          168      171       +3     
- Misses        141      144       +3     

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