Hi,

Please refer to the code:

from odoo import models, api

from odoo.exceptions import UserError

class YourWizard(models.TransientModel):

    _name = 'your.wizard'

    @api.model

    def action_confirm(self):

        if self.env.context.get('already_confirmed', False):

            raise UserError("This wizard has already been confirmed!")

        # Prevent double processing

        self = self.with_context(already_confirmed=True)

        # Your confirmation logic here

        # e.g., create records, update records

Hope it helps.