当单元格的内容对于页面而言太长时，ReportLab：LayoutError

我正在尝试用7个列创建一个表。最后一列包含一个长文本，这似乎会导致错误。似乎当单元格超出页面大小时，它将引发异常。

from reportlab.lib.pagesizes import landscape, A4
from reportlab.lib.styles import getSampleStyleSheet
from reportlab.platypus import SimpleDocTemplate, LongTable, TableStyle, Paragraph
from reportlab.lib import colors
from reportlab.lib.units import mm
from datetime import date

doc = SimpleDocTemplate(response, pagesize=A4, rightMargin=30,leftMargin=30, topMargin=30,bottomMargin=18)
doc.pagesize = landscape(A4)
elements = []

styles = getSampleStyleSheet()
cell_style = styles['BodyText']
cell_style.wordWrap = 1
cell_style.fontName = 'Courier'
cell_style.spaceBefore = 30
cell_style.spaceAfter = 30

title_style = styles['Title']
title_style.fontName = 'Courier'
title = Paragraph('Export Issue Tracker (%s)' % (date.today().isoformat()), title_style)
elements.append(title)

data2 = [[Paragraph(cell, cell_style) for cell in row] for row in data]
table = LongTable(data2, colWidths=(None, None, None, None, None, None, 50*mm))
table_style = TableStyle([('BOX', (0,0), (-1,-1), 0.25, colors.black),
                            ('INNERGRID', (0,0), (-1,-1), 0.25, colors.black),
                            ('FONTNAME',(0,0),(-1,-1),'Courier'),
                            ('VALIGN',(0,0),(-1,-1),'TOP'),
                            ('ALIGN',(0,0),(-1,0),'CENTER'),
                            ('TEXTCOLOR',(0,0),(-1,0), colors.yellow),
                            ('BACKGROUND', (0,0), (-1,0), colors.gray),
                            ('FONTSIZE',(0,0),(-1,-1),50)] + color_style)
table.setStyle(table_style)
elements.append(table)

doc.build(elements)

但是我收到以下错误：

LayoutError at /issues/export_comments/
Flowable  with cell(0,0) containing
u'9'(769.88976378 x 4782), tallest cell 2694.0 points,  too large on page 2 in frame 'normal'(769.88976378 x 535.275590551*) of template 'Later'

我已经看到很多关于如何使用KeepTogether，Spacer，LongTable的帖子，但是没有一个适合我。