diff --git a/qt/aqt/browser/table/table.py b/qt/aqt/browser/table/table.py
index 0bf2cd548..afcf6c33b 100644
--- a/qt/aqt/browser/table/table.py
+++ b/qt/aqt/browser/table/table.py
@@ -321,11 +321,17 @@ class Table:
         hh.setCascadingSectionResizes(False)
 
     def _save_header(self) -> None:
-        saveHeader(self._view.horizontalHeader(), self._state.GEOMETRY_KEY_PREFIX)
+        saveHeader(
+            self._view.horizontalHeader(), self._state.GEOMETRY_KEY_PREFIX + "631"
+        )
 
     def _restore_header(self) -> None:
         self._view.horizontalHeader().blockSignals(True)
-        restoreHeader(self._view.horizontalHeader(), self._state.GEOMETRY_KEY_PREFIX)
+        # Qt 6.3.1 won't allow headers to be clicked when restoring state from a previous
+        # version, so we need to bump the key.
+        restoreHeader(
+            self._view.horizontalHeader(), self._state.GEOMETRY_KEY_PREFIX + "631"
+        )
         self._set_column_sizes()
         self._set_sort_indicator()
         self._view.horizontalHeader().blockSignals(False)