Error:
Odoo Server Error

Traceback (most recent call last):
  File "/home/odoo/src/odoo/odoo/addons/base/models/qweb.py", line 347, in _compiled_fn
    return compiled(self, append, new, options, log)
  File "<template>", line 1, in template_2110_160
  File "<template>", line 2, in body_call_content_159
  File "<template>", line 17, in foreach_158
AttributeError: 'mrp.production' object has no attribute 'product_lines'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/odoo/src/odoo/addons/web/controllers/main.py", line 1671, in report_download
    response = self.report_routes(reportname, docids=docids, converter=converter)
  File "/home/odoo/src/odoo/odoo/http.py", line 519, in response_wrap
    response = f(*args, **kw)
  File "/home/odoo/src/odoo/addons/web/controllers/main.py", line 1612, in report_routes
    pdf = report.with_context(context).render_qweb_pdf(docids, data=data)[0]
  File "/home/odoo/src/odoo/odoo/addons/base/models/ir_actions_report.py", line 712, in render_qweb_pdf
    html = self.with_context(context).render_qweb_html(res_ids, data=data)[0]
  File "/home/odoo/src/enterprise/web_studio/models/ir_actions_report.py", line 18, in render_qweb_html
    return super(IrActionsReport, self).render_qweb_html(docids, data)
  File "/home/odoo/src/odoo/odoo/addons/base/models/ir_actions_report.py", line 752, in render_qweb_html
    return self.render_template(self.report_name, data), 'html'
  File "/home/odoo/src/odoo/odoo/addons/base/models/ir_actions_report.py", line 534, in render_template
    return view_obj.render_template(template, values)
  File "/home/odoo/src/odoo/odoo/addons/base/models/ir_ui_view.py", line 1304, in render_template
    return self.browse(self.get_view_id(template)).render(values, engine)
  File "/home/odoo/src/odoo/addons/web_editor/models/ir_ui_view.py", line 29, in render
    return super(IrUiView, self).render(values=values, engine=engine, minimal_qcontext=minimal_qcontext)
  File "/home/odoo/src/odoo/odoo/addons/base/models/ir_ui_view.py", line 1313, in render
    return self.env[engine].render(self.id, qcontext)
  File "/home/odoo/src/enterprise/web_studio/models/ir_qweb.py", line 43, in render
    return super(IrQWeb, self).render(template, values=values, **options)
  File "/home/odoo/src/odoo/odoo/addons/base/models/ir_qweb.py", line 59, in render
    result = super(IrQWeb, self).render(id_or_xml_id, values=values, **context)
  File "/home/odoo/src/odoo/odoo/addons/base/models/qweb.py", line 275, in render
    self.compile(template, options)(self, body.append, values or {})
  File "/home/odoo/src/odoo/odoo/addons/base/models/qweb.py", line 354, in _compiled_fn
    raise QWebException("Error to render compiling AST", e, path, node and etree.tostring(node[0], encoding='unicode'), name)
odoo.addons.base.models.qweb.QWebException: 'mrp.production' object has no attribute 'product_lines'
Traceback (most recent call last):
  File "/home/odoo/src/odoo/odoo/addons/base/models/qweb.py", line 347, in _compiled_fn
    return compiled(self, append, new, options, log)
  File "<template>", line 1, in template_2110_160
  File "<template>", line 2, in body_call_content_159
  File "<template>", line 17, in foreach_158
AttributeError: 'mrp.production' object has no attribute 'product_lines'

Error to render compiling AST
AttributeError: 'mrp.production' object has no attribute 'product_lines'
Template: 2110
Path: /templates/t/t/div/t/t
Node: <t t-foreach="mo.product_lines" t-as="pro_line">
                    <div class="label_design">
                        <table class="inside_label_design">
                            <tbody>

                                <tr>
                                    <td>
                                        <img t-if="res_company.logo" t-att-src="'data:image/png;base64,%s' % res_company.logo" style="width:32px;height:28px;padding-bottom:7px;"/>
                                    </td>
                                </tr>
                                <tr>
                                    <td>
                                        <strong>AEV Ref: </strong><span t-field="mo.sale_name"/>
                                    </td>
                                </tr>
                                <tr>
                                    <td>
                                  <strong>CUST Ref: </strong><span t-field="mo.sale_ref"/>
                                         </td>
                                </tr>
                                <tr>
                                    <td>
<strong>Spare For:</strong><p t-field="mo.bom_id.name"/>
                                    </td>
                                </tr>     <tr>
                                    <td style="height: 50px;vertical-align: top;">
                                        <strong>Part Ref: </strong><span t-field="pro_line.product_id.display_name"/>
                                    </td>
                                </tr>
<tr>
                                    <td>
                                        <strong>Qty: </strong><span t-esc="'%.0f' % pro_line.product_qty"/>
                                    </td>
                                </tr>
                            </tbody>
                        </table>
                    </div>
                </t>