diff --git a/addons/web/static/src/js/view_form.js b/addons/web/static/src/js/view_form.js
index 0252ca640cd..24c64ab2dfd 100644
--- a/addons/web/static/src/js/view_form.js
+++ b/addons/web/static/src/js/view_form.js
@@ -2404,7 +2404,14 @@ instance.web.form.Priority = instance.web.form.FieldChar.extend({
         var li = $(e.target).closest( "li" );
         if (li.length) {
             var value = {};
-            value[self.name] = String(li.data('value'));
+            if (self.val == li.data('value') && self.check_star) {
+                value[self.name] = String(li.data('value') - 1);
+                self.check_star = false
+            } else {
+                value[self.name] = String(li.data('value'));
+                self.check_star = true;
+            }
+            self.val = li.data('value')
             if (self.record_id) {
                 return self.view.dataset._model.call('write', [[self.record_id], value, self.view.dataset.get_context()]).done(self.reload_record.bind(self));
             } else {
diff --git a/addons/web/static/src/xml/base.xml b/addons/web/static/src/xml/base.xml
index dc305b03af6..8cdc1e38621 100644
--- a/addons/web/static/src/xml/base.xml
+++ b/addons/web/static/src/xml/base.xml
@@ -1015,7 +1015,7 @@
     <ul style="list-style: none; padding-left: 2px;">
         <t t-foreach="legends" t-as="rec" >
             <t t-if="widget.get('value') gte rec.name and !rec_first">
-                <li t-att-data-value="rec.name - 1" class="oe_left oe_legend"><a href="#" t-att-title="rec.legend_name"><t t-raw="rec.legend"/></a></li>
+                <li t-att-data-value="rec.name" class="oe_left oe_legend"><a href="#" t-att-title="rec.legend_name"><t t-raw="rec.legend"/></a></li>
             </t>
         </t>
         <t t-foreach="legends" t-as="rec" >
diff --git a/addons/web_kanban/static/src/js/kanban.js b/addons/web_kanban/static/src/js/kanban.js
index b84c06e5789..78d59163735 100644
--- a/addons/web_kanban/static/src/js/kanban.js
+++ b/addons/web_kanban/static/src/js/kanban.js
@@ -1296,7 +1296,14 @@ instance.web_kanban.Priority = instance.web_kanban.AbstractField.extend({
         var li = $(e.target).closest( "li" );
         if (li.length) {
             var value = {};
-            value[self.name] = String(li.data('value'));
+            if (self.parent.val == li.data('value') && self.parent.check_star) {
+                value[self.name] = String(li.data('value') - 1);
+                self.parent.check_star = false
+            } else {
+                value[self.name] = String(li.data('value'));
+                self.parent.check_star = true;
+            }
+            self.parent.val = li.data('value')
             return self.parent.view.dataset._model.call('write', [[self.record_id], value, self.parent.view.dataset.get_context()]).done(self.reload_record.bind(self.parent));
         }
     },