fix: exclude manual membership programs when identifying the lowest loyalty tier for partners

models/res_partner.py

@@ -68,7 +68,7 @@ class ResPartner(models.Model):
             )
             if not lowest_program:
                 lowest_program = self.env['loyalty.program'].sudo().search(
-                    [('multi_level_membership', '=', True)],
+                    [('multi_level_membership', '=', True), ('manual_membership', '=', False)],
                     order='minimum_spend asc',
                     limit=1
                 )