diff --git a/addons/board/static/src/add_to_board/add_to_board.xml b/addons/board/static/src/add_to_board/add_to_board.xml
index 73bc71371ab..586b7196768 100644
--- a/addons/board/static/src/add_to_board/add_to_board.xml
+++ b/addons/board/static/src/add_to_board/add_to_board.xml
@@ -15,7 +15,7 @@
         </Dropdown>
     </t>
 
-    <t t-name="Dashboard.DashboardIcon" owl="1">
+    <t t-name="Dashboard.DashboardIcon">
         <svg viewBox="0 0 50 50" xmlns="http://www.w3.org/2000/svg" class="oi-large">
             <path d="M4 8C4 5.79086 5.79086 4 8 4H25V21C25 23.2091 23.2091 25 21 25H4V8Z" fill="var(--oi-color, #FC868B)"/>
             <path d="M4 35C4 32.7909 5.79086 31 8 31H19V42C19 44.2091 17.2091 46 15 46H4V35Z" fill="var(--oi-color, #F9464C)"/>
diff --git a/addons/hr_attendance/static/src/components/attendance_menu/attendance_menu.xml b/addons/hr_attendance/static/src/components/attendance_menu/attendance_menu.xml
index 28f210449a8..d1738f6d3b5 100644
--- a/addons/hr_attendance/static/src/components/attendance_menu/attendance_menu.xml
+++ b/addons/hr_attendance/static/src/components/attendance_menu/attendance_menu.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8" ?>
 <templates xml:space="preserve">
 
-<t t-name="hr_attendance.attendance_menu" owl="1">
+<t t-name="hr_attendance.attendance_menu">
     <t t-if="this.state.isDisplayed">
         <Dropdown position="'bottom-end'" beforeOpen.bind="searchReadEmployee" menuClass="`p-2 pb-3`">
             <t t-set-slot="toggler">
diff --git a/addons/hr_skills/static/src/fields/form_view_one2many/form_view_one2many.xml b/addons/hr_skills/static/src/fields/form_view_one2many/form_view_one2many.xml
index 4df68cd9125..c7b3d3ee977 100644
--- a/addons/hr_skills/static/src/fields/form_view_one2many/form_view_one2many.xml
+++ b/addons/hr_skills/static/src/fields/form_view_one2many/form_view_one2many.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <templates xml:space="preserve">
-    <t t-name="hr_skills.X2ManyFieldDialog" t-inherit="web.X2ManyFieldDialog" t-inherit-mode="primary" owl="1">
+    <t t-name="hr_skills.X2ManyFieldDialog" t-inherit="web.X2ManyFieldDialog" t-inherit-mode="primary">
         <xpath expr="//button[hasclass('o_form_button_save')]" position="replace">
             <button class="btn btn-primary o_form_button_save" t-on-click="() => this.save()"  data-hotkey="c">Select &amp; Close</button>
         </xpath>
diff --git a/addons/mrp/static/src/components/mo_overview_byproducts_block/mrp_mo_overview_byproducts_block.xml b/addons/mrp/static/src/components/mo_overview_byproducts_block/mrp_mo_overview_byproducts_block.xml
index 987730c60d1..9aefde0aeae 100644
--- a/addons/mrp/static/src/components/mo_overview_byproducts_block/mrp_mo_overview_byproducts_block.xml
+++ b/addons/mrp/static/src/components/mo_overview_byproducts_block/mrp_mo_overview_byproducts_block.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <templates xml:space="preserve">
 
-    <t t-name="mrp.MoOverviewByproductsBlock" owl="1">
+    <t t-name="mrp.MoOverviewByproductsBlock">
         <t t-if="hasByproducts">
             <tr>
                 <td class="text-start">
diff --git a/addons/web/static/src/core/install_prompt/install_prompt.xml b/addons/web/static/src/core/install_prompt/install_prompt.xml
index 890012df0b4..98db5700adb 100644
--- a/addons/web/static/src/core/install_prompt/install_prompt.xml
+++ b/addons/web/static/src/core/install_prompt/install_prompt.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <templates xml:space="preserve">
-    <t t-name="web.InstallPrompt" owl="1">
+    <t t-name="web.InstallPrompt">
         <Dialog contentClass="'o_install_prompt position-fixed px-2 py-3 m-2'" size="'md'" footer="false">
             <t t-set-slot="header">
                 <div class="d-flex w-100">
diff --git a/addons/web/static/src/views/fields/statusbar/statusbar_field.xml b/addons/web/static/src/views/fields/statusbar/statusbar_field.xml
index 6217e055ea3..f5aa9079b66 100644
--- a/addons/web/static/src/views/fields/statusbar/statusbar_field.xml
+++ b/addons/web/static/src/views/fields/statusbar/statusbar_field.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <templates xml:space="preserve">
-    <t t-name="web.StatusBarField.Dropdown" owl="1">
+    <t t-name="web.StatusBarField.Dropdown">
         <Dropdown toggler="'parent'">
             <t t-foreach="items" t-as="item" t-key="item.value">
                 <DropdownItem
@@ -15,7 +15,7 @@
         <t t-esc="label" />
     </t>
 
-    <t t-name="web.StatusBarField" owl="1">
+    <t t-name="web.StatusBarField">
         <div class="o_statusbar_status" t-ref="root" role="radiogroup">
             <button
                 t-ref="after"
diff --git a/addons/web_editor/static/src/components/history_dialog/history_dialog.xml b/addons/web_editor/static/src/components/history_dialog/history_dialog.xml
index 8f696931e9d..7a86af11e37 100644
--- a/addons/web_editor/static/src/components/history_dialog/history_dialog.xml
+++ b/addons/web_editor/static/src/components/history_dialog/history_dialog.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8" ?>
 <templates xml:space="preserve">
-    <t t-name="web_editor.HistoryDialog" owl="1">
+    <t t-name="web_editor.HistoryDialog">
         <Dialog size="size" title="title">
             <div class="dialog-container html-history-dialog">
                 <div class="revision-list d-flex flex-column align-content-stretch">
@@ -44,7 +44,7 @@
                     </div>
                 </div>
             </div>
-            <t t-set-slot="footer" owl="1">
+            <t t-set-slot="footer">
                 <button class="btn btn-primary" t-on-click="_onRestoreRevisionClick">Restore history</button>
                 <button class="btn btn-secondary" t-on-click="props.close">Cancel</button>
             </t>
diff --git a/addons/web_hierarchy/static/src/hierarchy_controller.xml b/addons/web_hierarchy/static/src/hierarchy_controller.xml
index f1df51f5b0e..72da65ee6ea 100644
--- a/addons/web_hierarchy/static/src/hierarchy_controller.xml
+++ b/addons/web_hierarchy/static/src/hierarchy_controller.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8" ?>
 <templates>
-    <t t-name="web_hierarchy.HierarchyButtons" owl="1">
+    <t t-name="web_hierarchy.HierarchyButtons">
         <div class="d-flex o_grid_buttons">
             <div class="me-2" t-if="props.archInfo.activeActions.create and (!props.archInfo.createInline or displayNoContent)">
                 <button class="btn btn-primary o_hierarchy_button_add"
@@ -11,7 +11,7 @@
             </div>
         </div>
     </t>
-    <t t-name="web_hierarchy.HierarchyView" owl="1">
+    <t t-name="web_hierarchy.HierarchyView">
         <div t-attf-class="o_hierarchy_view {{ isMobile ? 'o_action_delegate_scroll' : '' }} {{ props.className }}" t-ref="root">
             <Layout className="(model.useSampleModel ? 'o_view_sample_data' : '') + ' d-flex'" display="props.display">
                 <t t-set-slot="control-panel-additional-actions">
diff --git a/addons/web_hierarchy/static/src/hierarchy_renderer.xml b/addons/web_hierarchy/static/src/hierarchy_renderer.xml
index 0e305fc4d75..6961a04ac59 100644
--- a/addons/web_hierarchy/static/src/hierarchy_renderer.xml
+++ b/addons/web_hierarchy/static/src/hierarchy_renderer.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8" ?>
 <templates>
 
-    <t t-name="web_hierarchy.HierarchyRenderer" owl="1">
+    <t t-name="web_hierarchy.HierarchyRenderer">
         <div class="o_hierarchy_renderer w-100 d-flex justify-content-center" t-ref="renderer">
             <div class="o_hierarchy_container d-flex flex-column px-3 pt-4 mw-xl-75">
                 <t t-foreach="rows" t-as="row" t-key="row_index">