Using v15EE

Have created a very simple module to add a field to the sales order form view. When I try install the module I get the following error:

Field "bay_fsmdesc" does not exist in model "sale.order"

View error context:
{'file': '/home/odoo/src/user/bay_salefsm_description/views/baysalesorderdescription.xml',
 'line': 3,
 'name': 'sale.order.form.sale.bay',
 'view': ir.ui.view(1568,),
 'view.model': 'sale.order',
 'view.parent': ir.ui.view(800,),
 'xmlid': 'bay_sale_order_customizations_form'}

Module code  and manifest

Manifest:

{'name': "bay_salefsm_description",
'summary': """        """,
'description': """    """,
'author': "sveng",
# Categories can be used to filter modules in modules listing# Check https://github.com/odoo/odoo/blob/master/odoo/addons/base/module/module_data.xml# for the full list'category': 'Uncategorized','version': '15.0.1.0','license': 'OPL-1',
# any module necessary for this one to work correctly'depends': ['sale_management', 'fieldservice', 'fieldservice_sale'],
# always loaded'data': ['views/baysalesorderdescription.xml',   # Add the modified view    ],# only loaded in demonstration mode#'demo': [#    'demo/demo.xml',#],'installable' : True,'application' :  False,
}

models:

from odoo import _, api, fields, models

from odoo.exceptions import ValidationError

classSaleOrder(models.Model):   _inherit="sale.order"
   bay_fsmdesc= fields.Char(string='FSM Order Description')

View:

xml version="1.0" encoding="UTF-8"?><odoo><recordid="bay_sale_order_customizations_form"model="ir.ui.view"><fieldname="name">sale.order.form.sale.bayfield><fieldname="model">sale.orderfield><fieldname="inherit_id"ref="sale.view_order_form"/><fieldname="arch"type="xml"><xpathexpr="//field[@name='partner_shipping_id']"position="after">    <fieldname="bay_fsmdesc"/>xpath>       field>   record>odoo>