lacking a defined variable 'blca_df_reindexed' in preprocess_cnas.ipynb

[Ringoio]

Hiii ：)
When I ran this code, this was a problem that held me back.
In notebook preprocess_cnas.ipynb, there is one column says:
cna_blca_matrix = cna_sample_matrix.loc[:, cna_sample_matrix.columns.isin(blca_df_reindexed.columns)]
But it turns out that name 'blca_df_reindexed' is not defined.
So what is 'blca_df_reindexed'?
Looking forward to your reply!
Thank!