diff --git a/poi-ooxml/src/main/java/org/apache/poi/xddf/usermodel/chart/XDDFChartData.java b/poi-ooxml/src/main/java/org/apache/poi/xddf/usermodel/chart/XDDFChartData.java
index 1dc47d47a4..983ef4f138 100644
--- a/poi-ooxml/src/main/java/org/apache/poi/xddf/usermodel/chart/XDDFChartData.java
+++ b/poi-ooxml/src/main/java/org/apache/poi/xddf/usermodel/chart/XDDFChartData.java
@@ -28,7 +28,6 @@ import org.apache.poi.logging.PoiLogManager;
 import org.apache.poi.ss.util.CellReference;
 import org.apache.poi.util.Beta;
 import org.apache.poi.util.Internal;
-import org.apache.poi.util.Removal;
 import org.apache.poi.xddf.usermodel.XDDFFillProperties;
 import org.apache.poi.xddf.usermodel.XDDFLineProperties;
 import org.apache.poi.xddf.usermodel.XDDFShapeProperties;
@@ -85,27 +84,6 @@ public abstract class XDDFChartData {
         return valueAxes;
     }
 
-    /**
-     * Calls to {@code getSeries().add(series)} or to {@code getSeries().remove(series)}
-     * may corrupt the workbook.
-     *
-     * <p>
-     * Instead, use the following methods:
-     * <ul>
-     * <li>{@link #getSeriesCount()}</li>
-     * <li>{@link #getSeries(int)}</li>
-     * <li>{@link #addSeries(XDDFDataSource,XDDFNumericalDataSource)}</li>
-     * <li>{@link #removeSeries(int)}</li>
-     * </ul>
-     *
-     * @deprecated since POI 4.1.1
-     */
-    @Deprecated
-    @Removal(version = "5.3")
-    public List<Series> getSeries() {
-        return Collections.unmodifiableList(series);
-    }
-
     public final int getSeriesCount() {
         return series.size();
     }
diff --git a/poi-ooxml/src/test/java/org/apache/poi/xddf/usermodel/chart/TestXDDFChartRemoveSeries.java b/poi-ooxml/src/test/java/org/apache/poi/xddf/usermodel/chart/TestXDDFChartRemoveSeries.java
index 8bea979e33..5ebd7d13b5 100644
--- a/poi-ooxml/src/test/java/org/apache/poi/xddf/usermodel/chart/TestXDDFChartRemoveSeries.java
+++ b/poi-ooxml/src/test/java/org/apache/poi/xddf/usermodel/chart/TestXDDFChartRemoveSeries.java
@@ -112,21 +112,7 @@ class TestXDDFChartRemoveSeries {
         }
         workbook.close();
     }
-
-    /**
-     * Attempt to remove the first series by calling chartData.getSeries().remove(0).
-     * <p>
-     * This used to corrupt the workbook but the returned <code>List</code> is unmodifiable.
-     */
-    @Test
-    void testRemoveSeries0() {
-        procName = "testRemoveSeries0";
-        fileName = procName + ".xlsx";
-
-        assertThrows(UnsupportedOperationException.class, () -> chartData.getSeries().remove(0));
-        assertEquals(2, chartData.getSeriesCount());
-    }
-
+    
     /**
      * Remove the first series by calling chartData.removeSeries(0).
      * <p>