diff --git a/Src/LexText/Morphology/AffixRuleFormulaControl.cs b/Src/LexText/Morphology/AffixRuleFormulaControl.cs
index 5cb652df97..d4a714094c 100644
--- a/Src/LexText/Morphology/AffixRuleFormulaControl.cs
+++ b/Src/LexText/Morphology/AffixRuleFormulaControl.cs
@@ -599,6 +599,8 @@ protected override int RemoveItems(SelectionHelper sel, bool forward, out int ce
 							int prevCellId = GetPrevCell(seqCtxt.Hvo);
 							cellIndex = GetCellCount(prevCellId) - 1;
 							Rule.InputOS.Remove(seqCtxt);
+							// Unschedule the removal of the column.
+							m_removeCol = null;
 							return prevCellId;
 						}
 						bool reconstruct = RemoveContextsFrom(forward, sel, seqCtxt, false, out cellIndex);