Hi everyone! i´m a newbie in Odoo and hope you can help me to fix this error:

When i go to CRM > Sales  and click on Create button or trying to edit existing opportunities, it goes to this error message:

Error:
Rastreo de error (Tracking Error):
Error: Unknown field user_id.department_id in domain
    at Class.compute (https://fastcom-sa.odoo.com/web/content/561-4d46000/web.assets_backend.js:322:55)
    at evalModifier (https://fastcom-sa.odoo.com/web/content/561-4d46000/web.assets_backend.js:1203:91)
    at Class._evalModifiers (https://fastcom-sa.odoo.com/web/content/561-4d46000/web.assets_backend.js:1206:44)
    at Class._registerModifiers (https://fastcom-sa.odoo.com/web/content/561-4d46000/web.assets_backend.js:1407:101)
    at Class._renderFieldWidget (https://fastcom-sa.odoo.com/web/content/561-4d46000/web.assets_backend.js:1412:550)
    at Class._renderInnerGroupField (https://fastcom-sa.odoo.com/web/content/561-4d46000/web.assets_backend.js:1688:381)
    at https://fastcom-sa.odoo.com/web/content/561-4d46000/web.assets_backend.js:1685:44
    at Array.forEach (<anonymous>)
    at Class._renderInnerGroup (https://fastcom-sa.odoo.com/web/content/561-4d46000/web.assets_backend.js:1682:75)
    at Class._renderTagGroup (https://fastcom-sa.odoo.com/web/content/561-4d46000/web.assets_backend.js:1697:248)

All suggestions are welcome, Thanks in advance! :)