The error indicates an issue with the security rule in rental_order_contract_security.xml . Specifically, the problem is with this line:

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< field  name = "domain_force" > [('company_id', 'in', company_ids)] </ field >

Possible Causes & Solutions:

1. company_ids is Undefined

Odoo does not recognize company_ids in the domain. Try replacing it with the correct Odoo environment variable:

Fix: Replace:

xml
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< field  name = "domain_force" > [('company_id', 'in', company_ids)] </ field >

With:

xml
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< field  name = "domain_force" > [('company_id', '=', user.company_id.id)] </ field >

Or, if multi-company is needed:

xml
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< field  name = "domain_force" > [('company_id', 'in', user.company_ids.ids)] </ field >

2. Incorrect Model Reference ( model_rental_order_contract )

Ensure that model_rental_order_contract is correctly defined in ir.model . To check this, go to Odoo shell:

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env[ 'ir.model' ].search([( 'model' , '=' , 'rental.order.contract' )])

If this returns an empty list, the model is missing or not properly defined.

3. Security Rule Placement Issue

Check if the security rule is loaded at the correct stage. If the model is defined in another module, ensure that the dependency is included in __manifest__.py :

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'depends' : [ 'base' , 'sale' , 'your_module_name' ],

4. Restart and Upgrade

After fixing the XML file, restart Odoo and update the module:

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sudo service odoo restart
odoo -u odoo_rental_sales