I have created a code that creates a new RFQ each time I confirm the sales order. The problem is whenever I confirm the RFQ to a Purchase Order, a new rfq is created by Odoo bot, this is the code I implemented:

class SaleOrderInherit(models.Model):
_inherit = 'sale.order'

def action_confirm(self):
res = super(SaleOrderInherit, self).action_confirm()

for order in self:
partner = self.env['res.partner'].search([('commercial_partner_id', '=', '[Partner X')],
limit=1)
rfq_type = self.env['purchase.order.type'].search([('name', '=', 'RFQ')], limit=1)
purchase = self.env['purchase.order'].with_context(company_id=order.company_id.id).create({
'partner_id': partner.id,
'type_id': rfq_type.id,
'company_id': 6,
})

for line in order.order_line:
if line.product_id:
purchase.order_line |= self.env['purchase.order.line'].new({
'product_id': line.product_id.id,
'name': line.product_id.name,
'product_qty': line.product_uom_qty,
'product_uom': line.product_uom.id,
'price_unit': line.product_id.purchase_price,
'taxes_id': line.product_id.taxes,
})

return res