fix missing import

sale_agent/models/account_invoice_report.py

@@ -3,6 +3,7 @@
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
 
 from odoo import fields, models
+from odoo.tools import SQL
 
 
 class AccountInvoiceReport(models.Model):
@@ -11,4 +12,4 @@ class AccountInvoiceReport(models.Model):
     invoice_agent_id = fields.Many2one("res.partner", string="Agent", readonly=True)
 
     def _select(self):
-        return SQL(", move.invoice_agent_id AS invoice_agent_id", super()._select())
+        return SQL("%s, move.invoice_agent_id AS invoice_agent_id", super()._select())