cooperative-market/beesdoo_account/models/res_config.py

from odoo import fields, models


class ResConfigSettings(models.TransientModel):
    _inherit = "res.config.settings"

    group_validate_invoice_negative_total_amount = fields.Boolean(
        """Allow validating an invoice with a negative total amount""",
        implied_group="beesdoo_account." "group_validate_invoice_negative_total_amount",
        help="""Allows you to validate an invoice with a negative total amount""",
    )