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[BugFix]: KeyError: 'Adafactor is already registered in optimizer at… #1610

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[BugFix]: KeyError: 'Adafactor is already registered in optimizer at… #1610

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2 changes: 1 addition & 1 deletion mmengine/optim/optimizer/builder.py
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Original file line number Diff line number Diff line change
Expand Up @@ -170,7 +170,7 @@ def register_transformers_optimizers():
except ImportError:
pass
else:
OPTIMIZERS.register_module(name='Adafactor', module=Adafactor)
OPTIMIZERS.register_module(name='Adafactor', module=Adafactor, force=True) # Same optimizer is introduced in PyTorch but transformers had it prior and forcing transformers one to keepup with backward compatibility.
transformer_optimizers.append('Adafactor')
return transformer_optimizers

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