diff --git a/product_configurator/models/product_config.py b/product_configurator/models/product_config.py
index 121a34b030..15536bbb91 100644
--- a/product_configurator/models/product_config.py
+++ b/product_configurator/models/product_config.py
@@ -548,9 +548,15 @@ def update_session_configuration_value(self, vals, product_tmpl_id=None):
                     if not vals[field_name]:
                         field_val = None
                     else:
-                        field_val = [
-                            i[1] for i in vals[field_name] if vals[field_name][0]
-                        ] or vals[field_name][0][1]
+                        field_val = []
+                        for field_vals in vals[field_name]:
+                            if field_vals[0] == 6:
+                                field_val += field_vals[2] or []
+                            elif field_vals[0] == 4:
+                                field_val.append(field_vals[1])
+                        # field_val = [
+                        #     i[1] for i in vals[field_name] if vals[field_name][0]
+                        # ] or vals[field_name][0][1]
                 elif not attr_line.multi and isinstance(vals[field_name], int):
                     field_val = vals[field_name]
                 else: