[Python] TypeError: KaplanMeierFitter.fit() got an unexpected keyword argument 'duration'

I'm trying to use Kaplan Meier Estimator in my python 3.10.12. My data set looks like

| duration |Paid_off|
| | |
---------------------
| 19.0 | 1 |
| 24.0 | 0 |


I have written following python code

from lifelines import KaplanMeierFitter
data_kmf=KaplanMeierFitter()
data_kmf.fit(duration=data_df["duration"],event_observed=data_df["paid_off"])


But I'm getting error saying

TypeError: KaplanMeierFitter.fit() got an unexpected keyword argument 'duration'

Can you please help me to resolve the error?

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