Error:
Odoo Server Error

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/odoo/models.py", line 1057, in _validate_fields
    check(self)
  File "/usr/lib/python3/dist-packages/odoo/addons/base/ir/ir_ui_view.py", line 342, in _check_xml
    self.postprocess_and_fields(view.model, view_doc, view.id)
  File "/usr/lib/python3/dist-packages/odoo/addons/base/ir/ir_ui_view.py", line 1083, in postprocess_and_fields
    self.raise_view_error(message, view_id)
  File "/usr/lib/python3/dist-packages/odoo/addons/base/ir/ir_ui_view.py", line 533, in raise_view_error
    raise ValueError(message)
ValueError: El campo `margin` no existe

Contexto del error:
Vista `product_fixed_margin_tree`
[view_id: 1453, xml_id: aucst_product_pricing_fix.product_fixed_margin_tree, model: product.template, parent_id: n/a]

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/odoo/tools/convert.py", line 745, in parse
    self._tags[rec.tag](rec, de, mode=mode)
  File "/usr/lib/python3/dist-packages/odoo/tools/convert.py", line 655, in _tag_record
    id = self.env(context=rec_context)['ir.model.data']._update(rec_model, self.module, res, rec_id or False, not self.isnoupdate(data_node), noupdate=self.isnoupdate(data_node), mode=self.mode)
  File "/usr/lib/python3/dist-packages/odoo/addons/base/ir/ir_model.py", line 1488, in _update
    record.write(values)
  File "/usr/lib/python3/dist-packages/odoo/addons/base/ir/ir_ui_view.py", line 425, in write
    res = super(View, self).write(self._compute_defaults(vals))
  File "/usr/lib/python3/dist-packages/odoo/models.py", line 3169, in write
    field.determine_inverse(records)
  File "/usr/lib/python3/dist-packages/odoo/fields.py", line 1092, in determine_inverse
    getattr(records, self.inverse)()
  File "/usr/lib/python3/dist-packages/odoo/addons/base/ir/ir_ui_view.py", line 273, in _inverse_arch
    view.write(data)
  File "/usr/lib/python3/dist-packages/odoo/addons/base/ir/ir_ui_view.py", line 425, in write
    res = super(View, self).write(self._compute_defaults(vals))
  File "/usr/lib/python3/dist-packages/odoo/models.py", line 3149, in write
    self._write(old_vals)
  File "/usr/lib/python3/dist-packages/odoo/models.py", line 3320, in _write
    self._validate_fields(vals)
  File "/usr/lib/python3/dist-packages/odoo/models.py", line 1061, in _validate_fields
    raise ValidationError("%s\n\n%s" % (_("Error while validating constraint"), tools.ustr(e)))
odoo.exceptions.ValidationError: ('Error mientras se validaban las restricciones\n\nEl campo `margin` no existe\n\nContexto del error:\nVista `product_fixed_margin_tree`\n[view_id: 1453, xml_id: aucst_product_pricing_fix.product_fixed_margin_tree, model: product.template, parent_id: n/a]', None)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 653, in _handle_exception
    return super(JsonRequest, self)._handle_exception(exception)
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 312, in _handle_exception
    raise pycompat.reraise(type(exception), exception, sys.exc_info()[2])
  File "/usr/lib/python3/dist-packages/odoo/tools/pycompat.py", line 87, in reraise
    raise value
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 695, in dispatch
    result = self._call_function(**self.params)
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 344, in _call_function
    return checked_call(self.db, *args, **kwargs)
  File "/usr/lib/python3/dist-packages/odoo/service/model.py", line 97, in wrapper
    return f(dbname, *args, **kwargs)
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 337, in checked_call
    result = self.endpoint(*a, **kw)
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 939, in __call__
    return self.method(*args, **kw)
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 517, in response_wrap
    response = f(*args, **kw)
  File "/usr/lib/python3/dist-packages/odoo/addons/web/controllers/main.py", line 938, in call_button
    action = self._call_kw(model, method, args, {})
  File "/usr/lib/python3/dist-packages/odoo/addons/web/controllers/main.py", line 926, in _call_kw
    return call_kw(request.env[model], method, args, kwargs)
  File "/usr/lib/python3/dist-packages/odoo/api.py", line 699, in call_kw
    return call_kw_multi(method, model, args, kwargs)
  File "/usr/lib/python3/dist-packages/odoo/api.py", line 690, in call_kw_multi
    result = method(recs, *args, **kwargs)
  File "<decorator-gen-48>", line 2, in button_immediate_upgrade
  File "/usr/lib/python3/dist-packages/odoo/addons/base/module/module.py", line 72, in check_and_log
    return method(self, *args, **kwargs)
  File "/usr/lib/python3/dist-packages/odoo/addons/base/module/module.py", line 618, in button_immediate_upgrade
    return self._button_immediate_function(type(self).button_upgrade)
  File "/usr/lib/python3/dist-packages/odoo/addons/base/module/module.py", line 552, in _button_immediate_function
    modules.registry.Registry.new(self._cr.dbname, update_module=True)
  File "/usr/lib/python3/dist-packages/odoo/modules/registry.py", line 85, in new
    odoo.modules.load_modules(registry._db, force_demo, status, update_module)
  File "/usr/lib/python3/dist-packages/odoo/modules/loading.py", line 376, in load_modules
    force, status, report, loaded_modules, update_module, models_to_check)
  File "/usr/lib/python3/dist-packages/odoo/modules/loading.py", line 274, in load_marked_modules
    perform_checks=perform_checks, models_to_check=models_to_check
  File "/usr/lib/python3/dist-packages/odoo/modules/loading.py", line 181, in load_module_graph
    _load_data(cr, module_name, idref, mode, kind='data')
  File "/usr/lib/python3/dist-packages/odoo/modules/loading.py", line 95, in _load_data
    tools.convert_file(cr, module_name, filename, idref, mode, noupdate, kind, report)
  File "/usr/lib/python3/dist-packages/odoo/tools/convert.py", line 792, in convert_file
    convert_xml_import(cr, module, fp, idref, mode, noupdate, report)
  File "/usr/lib/python3/dist-packages/odoo/tools/convert.py", line 853, in convert_xml_import
    obj.parse(doc.getroot(), mode=mode)
  File "/usr/lib/python3/dist-packages/odoo/tools/convert.py", line 742, in parse
    self.parse(rec, mode)
  File "/usr/lib/python3/dist-packages/odoo/tools/convert.py", line 752, in parse
    exc_info[2]
  File "/usr/lib/python3/dist-packages/odoo/tools/pycompat.py", line 86, in reraise
    raise value.with_traceback(tb)
  File "/usr/lib/python3/dist-packages/odoo/tools/convert.py", line 745, in parse
    self._tags[rec.tag](rec, de, mode=mode)
  File "/usr/lib/python3/dist-packages/odoo/tools/convert.py", line 655, in _tag_record
    id = self.env(context=rec_context)['ir.model.data']._update(rec_model, self.module, res, rec_id or False, not self.isnoupdate(data_node), noupdate=self.isnoupdate(data_node), mode=self.mode)
  File "/usr/lib/python3/dist-packages/odoo/addons/base/ir/ir_model.py", line 1488, in _update
    record.write(values)
  File "/usr/lib/python3/dist-packages/odoo/addons/base/ir/ir_ui_view.py", line 425, in write
    res = super(View, self).write(self._compute_defaults(vals))
  File "/usr/lib/python3/dist-packages/odoo/models.py", line 3169, in write
    field.determine_inverse(records)
  File "/usr/lib/python3/dist-packages/odoo/fields.py", line 1092, in determine_inverse
    getattr(records, self.inverse)()
  File "/usr/lib/python3/dist-packages/odoo/addons/base/ir/ir_ui_view.py", line 273, in _inverse_arch
    view.write(data)
  File "/usr/lib/python3/dist-packages/odoo/addons/base/ir/ir_ui_view.py", line 425, in write
    res = super(View, self).write(self._compute_defaults(vals))
  File "/usr/lib/python3/dist-packages/odoo/models.py", line 3149, in write
    self._write(old_vals)
  File "/usr/lib/python3/dist-packages/odoo/models.py", line 3320, in _write
    self._validate_fields(vals)
  File "/usr/lib/python3/dist-packages/odoo/models.py", line 1061, in _validate_fields
    raise ValidationError("%s\n\n%s" % (_("Error while validating constraint"), tools.ustr(e)))
odoo.tools.convert.ParseError: "Error mientras se validaban las restricciones

El campo `margin` no existe

Contexto del error:
Vista `product_fixed_margin_tree`
[view_id: 1453, xml_id: aucst_product_pricing_fix.product_fixed_margin_tree, model: product.template, parent_id: n/a]
None" while parsing /mnt/extra-addons/aucst_product_pricing_fix/views/views.xml:18, near
<record model="ir.ui.view" id="product_fixed_margin_tree">
      <field name="name">product_fixed_margin_tree</field>
      <field name="model">product.template</field>
      <field name="arch" type="xml">
        <tree string="Margin Tags">
          <field name="name"/>
          <!-- <field name="supplier_id"/> -->
          <field name="margin"/>
          <field name="sequence" invisible="1"/>
        </tree>
      </field>
    </record>