diff --git a/python/gui/auto_generated/qgsfieldmappingwidget.sip.in b/python/gui/auto_generated/qgsfieldmappingwidget.sip.in
index ebd3069a9605..07070603adc9 100644
--- a/python/gui/auto_generated/qgsfieldmappingwidget.sip.in
+++ b/python/gui/auto_generated/qgsfieldmappingwidget.sip.in
@@ -146,9 +146,11 @@ Moves up currently selected field
 Moves down the currently selected field
 %End
 
-    bool invertSelection( );
+    void invertSelection( );
 %Docstring
-Invert the field selection state
+Invert the field selection state.
+
+.. versionadded:: 3.32
 %End
 
 };
diff --git a/src/gui/qgsfieldmappingwidget.cpp b/src/gui/qgsfieldmappingwidget.cpp
index 0fa3f82825c9..df426e449943 100644
--- a/src/gui/qgsfieldmappingwidget.cpp
+++ b/src/gui/qgsfieldmappingwidget.cpp
@@ -148,7 +148,7 @@ bool QgsFieldMappingWidget::removeSelectedFields()
   return true;
 }
 
-bool QgsFieldMappingWidget::invertSelection()
+void QgsFieldMappingWidget::invertSelection()
 {
   for ( int i = 0; i < mTableView->model()->rowCount(); ++i )
   {
@@ -158,7 +158,6 @@ bool QgsFieldMappingWidget::invertSelection()
       mTableView->selectionModel()->select( index, QItemSelectionModel::Toggle );
     }
   }
-  return true;
 }
 
 bool QgsFieldMappingWidget::moveSelectedFieldsUp()