Dataset type change error after python recipe

[Lo96]

I'm using Python recipe (pandas) to edit column names of my dataset (names changed after pivot recipe). after python recipe type of one column changes.  The problem is i get following error "The schema of the dataset does not match the table" 

• Type mismatch for column 1 (serial) : 'NVARCHAR' in dataset, 'DOUBLE'(8:float) in table

when I try to change column's type on the output table. 

Any ideas on how to solve this? 

thanks 

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Operating system used: windows

[Turribeach]

Please post your recipe code in a code block (the </> icon on the toolbar). Thanks