diff --git a/addons/stock/static/src/widgets/generate_serial.js b/addons/stock/static/src/widgets/generate_serial.js
index 7ddbf48546a..bd33e074a92 100644
--- a/addons/stock/static/src/widgets/generate_serial.js
+++ b/addons/stock/static/src/widgets/generate_serial.js
@@ -20,6 +20,7 @@ export class GenerateDialog extends Component {
 
         this.nextSerial = useRef('nextSerial');
         this.nextSerialCount = useRef('nextSerialCount');
+        this.keepLines = useRef('keepLines');
         this.lots = useRef('lots');
         this.orm = useService("orm");
         onMounted(() => {
@@ -51,11 +52,18 @@ export class GenerateDialog extends Component {
                 })
             );
         }
+        if (!this.keepLines.el.checked) {
+            await lines._applyCommands(lines._currentIds.map((currentId) => [
+                x2ManyCommands.DELETE,
+                currentId,
+            ]));
+        }
         lines.records.push(...newlines);
         lines._commands.push(...newlines.map((record) => [
             x2ManyCommands.CREATE,
             record._virtualId,
         ]));
+        lines._currentIds.push(...newlines.map((record) => record._virtualId));
         await lines._onUpdate();
         this.props.close();
     }
diff --git a/addons/stock/static/src/widgets/lots_dialog.xml b/addons/stock/static/src/widgets/lots_dialog.xml
index c026a838719..c3df258dfb1 100644
--- a/addons/stock/static/src/widgets/lots_dialog.xml
+++ b/addons/stock/static/src/widgets/lots_dialog.xml
@@ -31,6 +31,16 @@
                                 </div>
                             </div>
                         </div>
+                        <div class="d-flex d-sm-contents">
+                            <div class="o_cell flex-grow-0 flex-sm-grow-0 text-900 pe-3">
+                                <label class="o_form_label" for="keep_lines_0">Keep current lines</label>
+                            </div>
+                            <div class="o_cell flex-grow-1 flex-sm-grow-0">
+                                <div name="keep_lines" class="o_input">
+                                    <input type="checkbox" t-ref="keepLines" id="keep_lines_0"/>
+                                </div>
+                            </div>
+                        </div>
                     </div>
                 </t>
                 <t t-if="props.type === 'import'" class="d-flex">
@@ -47,6 +57,16 @@
                                     class="o_input" t-ref="lots" id="next_serial_0" type="text"/>
                             </div>
                         </div>
+                        <div class="d-flex d-sm-contents">
+                            <div class="o_cell flex-grow-0 flex-sm-grow-0 text-900 pe-3">
+                                <label class="o_form_label" for="keep_lines_0">Keep current lines</label>
+                            </div>
+                        </div>
+                        <div class="o_cell flex-grow-1 flex-sm-grow-0">
+                            <div name="keep_lines" class="o_input">
+                                <input type="checkbox" t-ref="keepLines" id="keep_lines_0"/>
+                            </div>
+                        </div>
                     </div>
                 </t>
             </div>