diff --git a/src/core/layout/qgslayoutmanager.cpp b/src/core/layout/qgslayoutmanager.cpp
index 75f0d34733d..020809886d2 100644
--- a/src/core/layout/qgslayoutmanager.cpp
+++ b/src/core/layout/qgslayoutmanager.cpp
@@ -44,7 +44,10 @@ bool QgsLayoutManager::addLayout( QgsMasterLayoutInterface *layout )
   for ( QgsMasterLayoutInterface *l : qgis::as_const( mLayouts ) )
   {
     if ( l->name() == layout->name() )
+    {
+      delete layout;
       return false;
+    }
   }
 
   // ugly, but unavoidable for interfaces...