diff --git a/addons/ospp_slide/views/views.xml b/addons/ospp_slide/views/views.xml
index e49db5c..e1d0169 100644
--- a/addons/ospp_slide/views/views.xml
+++ b/addons/ospp_slide/views/views.xml
@@ -22,7 +22,7 @@
                                      attrs="{'invisible': [('instance_arrangement', 'in', ['no_need'])]}"/>
                         </group>
                     </group>
-                    <field name="instance_ids" mode="tree,form" readonly="0" attrs="{'invisible': [('instance_arrangement', 'in', ['no_need'])]}">
+                    <field name="instance_ids" mode="tree,form" readonly="1" attrs="{'invisible': [('instance_arrangement', 'in', ['no_need'])]}">
                         <tree>
                             <field name="sequence" widget="handle"/>
                             <field name="code"/>