Fix unit weight

[GiggleLiu]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 93.84%. Comparing base (08014f6) to head (1cf1f29).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/models/models.jl	50.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #149   +/-   ##
=======================================
  Coverage   93.83%   93.84%           
=======================================
  Files          39       39           
  Lines        1639     1640    +1     
=======================================
+ Hits         1538     1539    +1     
  Misses        101      101           

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