diff --git a/.changeset/slimy-suns-joke.md b/.changeset/slimy-suns-joke.md
new file mode 100644
index 0000000000..1d3f0dcfde
--- /dev/null
+++ b/.changeset/slimy-suns-joke.md
@@ -0,0 +1,5 @@
+---
+"@udecode/plate-table": patch
+---
+
+Fix unmerging a single column
diff --git a/packages/table/src/merge/computeCellIndices.ts b/packages/table/src/merge/computeCellIndices.ts
index 57c727f86c..c1e1efdc45 100644
--- a/packages/table/src/merge/computeCellIndices.ts
+++ b/packages/table/src/merge/computeCellIndices.ts
@@ -1,6 +1,7 @@
 import { getPluginOptions, PlateEditor, Value } from '@udecode/plate-common';
 
 import { ELEMENT_TABLE } from '../createTablePlugin';
+import { getRowSpan } from '../queries/getRowSpan';
 import {
   TablePlugin,
   TTableCellElement,
@@ -40,15 +41,16 @@ export function computeCellIndices<V extends Value>(
     prevRow.children.forEach((pC) => {
       const prevCell = pC as TTableCellElement;
       const prevIndices = options?._cellIndices?.get(prevCell);
+      const _rowSpan = getRowSpan(prevCell);
       if (prevIndices) {
         const { col: prevColIndex } = prevIndices;
         if (
           // colIndex affects
           prevColIndex <= colIndex &&
           // rowSpan affects
-          prevCell.rowSpan &&
-          prevCell.rowSpan > 1 &&
-          rowIndex - _rowIndex < prevCell.rowSpan
+          _rowSpan &&
+          _rowSpan > 1 &&
+          rowIndex - _rowIndex < _rowSpan
         ) {
           colIndex += prevCell.colSpan || 1;
         }
diff --git a/packages/table/src/merge/isTableRectangular.ts b/packages/table/src/merge/isTableRectangular.ts
index ff3b216712..d0f3d42fff 100644
--- a/packages/table/src/merge/isTableRectangular.ts
+++ b/packages/table/src/merge/isTableRectangular.ts
@@ -1,3 +1,4 @@
+import { getRowSpan } from '../queries/getRowSpan';
 import { TTableCellElement, TTableElement, TTableRowElement } from '../types';
 
 const allEqual = (arr: number[]) => arr.every((val) => val === arr[0]);
@@ -14,7 +15,7 @@ export const isTableRectangular = (table?: TTableElement) => {
       const cellElem = cell as TTableCellElement;
 
       Array.from({
-        length: cellElem?.rowSpan || 1,
+        length: getRowSpan(cellElem) || 1,
       } as ArrayLike<number>).forEach((_, i) => {
         if (!arr[rI + i]) {
           arr[rI + i] = 0;
diff --git a/packages/table/src/merge/unmergeTableCells.ts b/packages/table/src/merge/unmergeTableCells.ts
index 400e34f21d..a0451d9768 100644
--- a/packages/table/src/merge/unmergeTableCells.ts
+++ b/packages/table/src/merge/unmergeTableCells.ts
@@ -13,6 +13,7 @@ import {
 import { ELEMENT_TABLE, ELEMENT_TR } from '../createTablePlugin';
 import { getTableGridAbove } from '../queries';
 import { getColSpan } from '../queries/getColSpan';
+import { getRowSpan } from '../queries/getRowSpan';
 import { TablePlugin, TTableCellElement, TTableRowElement } from '../types';
 import { getEmptyCellNode } from '../utils';
 import { getCellIndices } from './getCellIndices';
@@ -45,8 +46,8 @@ export const unmergeTableCells = <V extends Value = Value>(
 
     const cellPath = path.slice(-2);
     const [rowPath, colPath] = cellPath;
-    const colSpan = cellElem.colSpan as number;
-    const rowSpan = cellElem.rowSpan as number;
+    const colSpan = getColSpan(cellElem as TTableCellElement);
+    const rowSpan = getRowSpan(cellElem as TTableCellElement);
 
     // Generate an array of column paths from the colspan
     const colPaths: number[] = [];
@@ -69,8 +70,12 @@ export const unmergeTableCells = <V extends Value = Value>(
         at: [...tablePath, row],
         match: { type: getPluginType(editor, ELEMENT_TR) },
       })!; // TODO: improve typing
-      const rowEl = rowEntry[0] as TTableRowElement;
 
+      if (!rowEntry) {
+        return newColPath;
+      }
+
+      const rowEl = rowEntry[0] as TTableRowElement;
       for (const item of rowEl.children) {
         const { col: c } = getCellIndices(
           cellIndices!,
@@ -93,16 +98,39 @@ export const unmergeTableCells = <V extends Value = Value>(
     for (let i = 0; i < rowSpan; i++) {
       const currentRowPath = rowPath + i;
       const pathForNextRows = getColPathForRow(currentRowPath);
-      for (let j = 0; j < colPaths.length; j++) {
-        const currentColPath = i === 0 ? colPaths[j] : pathForNextRows;
+      const newRowChildren = [];
+      const _rowPath = [...tablePath, currentRowPath];
+      const rowEntry = findNode(editor, {
+        at: _rowPath,
+        match: { type: getPluginType(editor, ELEMENT_TABLE) },
+      });
 
-        const pathForNewCell = [...tablePath, currentRowPath, currentColPath];
+      for (let j = 0; j < colPaths.length; j++) {
         const cellToInsert =
           i === 0 && j === 0
             ? createEmptyCell(cellElem.children)
             : createEmptyCell();
 
-        insertElements(editor, cellToInsert, { at: pathForNewCell });
+        // if row exists, insert into it, otherwise insert row
+        if (rowEntry) {
+          const currentColPath = i === 0 ? colPaths[j] : pathForNextRows;
+          const pathForNewCell = [...tablePath, currentRowPath, currentColPath];
+
+          insertElements(editor, cellToInsert, { at: pathForNewCell });
+        } else {
+          newRowChildren.push(cellToInsert);
+        }
+      }
+
+      if (!rowEntry) {
+        insertElements(
+          editor,
+          {
+            type: getPluginType(editor, ELEMENT_TR),
+            children: newRowChildren,
+          },
+          { at: _rowPath }
+        );
       }
     }
   });
diff --git a/packages/table/src/merge/useTableMergeState.ts b/packages/table/src/merge/useTableMergeState.ts
index 32e8806e92..f142dd8f37 100644
--- a/packages/table/src/merge/useTableMergeState.ts
+++ b/packages/table/src/merge/useTableMergeState.ts
@@ -11,6 +11,8 @@ import { useReadOnly, useSelected } from 'slate-react';
 
 import { ELEMENT_TABLE } from '../createTablePlugin';
 import { getTableGridAbove } from '../queries';
+import { getColSpan } from '../queries/getColSpan';
+import { getRowSpan } from '../queries/getRowSpan';
 import { useTableStore } from '../stores';
 import { TablePlugin } from '../types';
 import { isTableRectangular } from './isTableRectangular';
@@ -56,8 +58,8 @@ export const useTableMergeState = () => {
     collapsed &&
     selectedCellEntries &&
     selectedCellEntries.length === 1 &&
-    ((selectedCellEntries[0][0] as any)?.colSpan > 1 ||
-      (selectedCellEntries[0][0] as any)?.rowSpan > 1);
+    (getColSpan(selectedCellEntries[0][0] as any) > 1 ||
+      getRowSpan(selectedCellEntries[0][0] as any) > 1);
 
   return { canMerge, canUnmerge };
 };