Follow these steps to link UTMs in a book issue generated from the web page on the /books/submit_issues URL:

1. Add a utm module in the depends section of manifest.py , as follows:

 'depends': ['base', 'website', 'utm'],

2. Inherit utm.mixin in the book.issue model, as follows:

class LibraryBookIssues(models.Model):
    _name = 'book.issue'
    _inherit = ['utm.mixin']

    book_id = fields.Many2one('library.book', required=True)
    submitted_by = fields.Many2one('res.users')
    issue_description = fields.Text()

3. Add a campaign_id field in the tree view of the book_issue_ids field, as follows:

...
<group string="Book Issues">
    <field name="book_issue_ids" nolabel="1">
        <tree name="Book isuues">
            <field name="create_date"/>
            <field name="submitted_by"/>
            <field name="issue_description"/>
            <field name="campaign_id"/>
        </tree>
    </field>
</group>
...

Update the module to apply the changes. To test the UTM, you need to perform the following steps:

• In Odoo, UTM is processed based on cookies, and some browsers do not support cookies in the localhost, so if you are testing it with the localhost, access the instance with http://127.0.0.1:8069.
• By default, UTM tracking is blocked for salespeople. Consequently, to test the UTM feature, you need to log in with a portal user.
• Now, open the URL like this http://127.0.0.1:8069/books/submit_issues?utm_campaign=sale.
• Submit the book issue and check the book issue in the backend. This will display the campaign in the book's form view.