## Answer "[Export](/en/manual/table-record-export)" the records, make sure to check "Update record with the same key" and then "[Import](/en/manual/table-record-import)". --- ## Overview If you enable "[Multiple Selection](/en/manual/table-management-multiple-selections)" on a classification that already has registered data, rather than a newly added classification, the data storage format will change and it will not be displayed correctly on the editing screen. In the image below, the Participant column is a classification with multiple selections enabled, and the first and second rows are records created after multiple selection was enabled, and the third row is a record created before multiple selection was enabled. The data itself is saved correctly, so it is displayed correctly on the list screen.  It will be displayed as unselected on the editing screen.  ## Operation Procedure To display correctly, convert the data storage format using the following procedure. ・Export data in list view. When doing so, be sure to include the target classification as the column to be exported. Normally, the column enabled in the Grid tab and Editor tab of the Manage Table are output. ・Import the exported file. Be sure to check "Update record with the same key" in the import dialog and click the Import button.  ・After the import is complete, data before enabling multiple selection will also be displayed correctly selected.  ## Related Information <div id="ManualList"><ul><li><a href="/en/manual/table-record-import">Table Function: Import Record</a><span>02.06.2025 up</span></li> <li><a href="/en/manual/table-record-export">Table Function: Export Records</a><span>08.13.2024 up</span></li></ul></article> <ul><li><a href="/en/manual/table-management-multiple-selections">Manage Table: Editor: Column Advanced Settings: Multiple Selection</a><span>10.02.2024 up</span></li></ul></article></div><input id="SearchTextHidden" type="hidden" value="" />