Fixed bug using sub_clone=True

[jackton1]

No description provided.

[codecov]

Codecov Report

Merging #302 (c5e9029) into main (eb60b1c) will increase coverage by 0.33%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #302      +/-   ##
==========================================
+ Coverage   95.98%   96.32%   +0.33%     
==========================================
  Files           6        6              
  Lines         274      272       -2     
==========================================
- Hits          263      262       -1     
+ Misses         11       10       -1     

Impacted Files	Coverage Δ
model_clone/mixins/clone.py	95.62% <100.00%> (+0.56%)	⬆️

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