Odoo version: 11.0 (community)

DB: PostgreSQL 12

Module Type: Custom Addon

What I had

Two related models:

# models/order_line.py
class OrderLine(models. Model):
 _name = 'x.order.line'
 _description = 'Order Line'

order_id = fields. Many2one('res.partner', string='Customer', required=True)
 product_id = fields. Many2one('product.product', string='Product', required=True)
 qty = fields. Float(string='Qty', required=True)

class ResPartner(models. Model):

    _inherit = 'res.partner'

line_ids = fields. One2many(

        'x.order.line',

        inverse_name='order_id',

        string='Lines'

    )

What I did

I removed this feature from the codebase entirely:

• deleted the model x.order.line
• deleted the field res.partner.line_ids
• removed the related XML views that I knew about

I don't need this data anymore. I want it gone without uninstalling the whole module.

The problem

On server start or when opening Contacts, I get:

KeyError: 'line_ids'

So something in metadata still references the old field.

What I already tried

1. Remove ORM metadata for the field

self.env['ir.model.fields'].search([('name', '=', 'line_ids')]).unlink()

1. Remove references in views

self.env['ir.ui.view'].search([('arch_db', 'ilike', 'line_ids')]).unlink()

1. Drop the DB column/table

• If any stored column existed, I dropped it with SQL.
  (For One2many there is no column on the parent; I dropped the now-orphaned x_order_line table.)

Still getting KeyError: line_ids.

What I'm asking

What is the correct, complete cleanup path to eliminate this error without uninstalling the module, ensuring no leftover data or references to the removed field/model remain?

I'm fine with deleting all related data.