I am getting kind of weird error when I tried to Merged my Dataframe files which has 930333 rows & 21 columns in FullRaw1 as well 56078 rows & 2 columns in CustTag at the time of merge i'm getting error of "Unable to allocate 11.6 GiB for an array with shape (1554122468,) and data type int64"
FullRaw1 = pd.merge(FullRaw1, CustTag, how ='left', on ='Customer_No').drop_duplicates()