Having issue while merging graph in xlsxwriter - python-3.x

Question

I am trying to merge two graphs in xlsxwriter.
1 : a line graph
2 : a stacked graph having y2 axis.
While merging for the second graph the staring value is coming from the negative value of the line graph. Like below image. I want it start from x axis only i.e from 0. Please find the code i hv used for both graphs.
line_chart.set_x_axis({
'name_font': {'size': 14, 'bold': True},
'major_gridlines': {'visible': False},
'major_tick_mark': 'none',
'minor_tick_mark': 'none'
})
line_chart.set_y_axis({
'name': 'Sales',
'name_font': {'size': 14, 'bold': True},
'major_gridlines': {'visible': False},
'major_tick_mark': 'none',
'minor_tick_mark': 'none',
})
line_chart.add_series({
'name': ' ',
'categories': '=data_sheet!$F$2:$F$25',
'values': '=data_sheet!$D$2:$D$25',
'line': {'color': '#FFCC00'},
'marker': {'type': 'square',
'border': {'color': 'red'},
'fill': {'color': 'red'}
},
})
bar_chart = workbook.add_chart({'type': 'column', 'subtype': 'stacked'})
bar_chart.set_x_axis({
'name_font': {'size': 14, 'bold': True},
'major_gridlines': {'visible': False},
'major_tick_mark': 'none',
'minor_tick_mark': 'none'
})
bar_chart.set_y2_axis({
'name': 'Traffic',
'name_font': {'size': 14, 'bold': True},
'major_gridlines': {'visible': False},
'major_tick_mark': 'none',
'minor_tick_mark': 'none'
})
bar_chart.add_series({
'name': '',
'fill': {'color': 'white'},
'categories': '=data_sheet!$F$2:$F$25',
'values': '=data_sheet!$B$2:$B$25',
'y2_axis': True,
})
bar_chart.add_series({
'name': '',
'fill': {'color': '#117A9A'},
'categories': '=data_sheet!$F$2:$F$25',
'values': '=data_sheet!$A$2:$A$25',
'y2_axis': True,
})
line_chart.combine(bar_chart)
line_chart.set_legend({'position': 'low'})
line_chart.set_size({'width': 1025, 'height': 360})
line_chart.set_chartarea({'border': {'none': True}})