diff --git a/src/main/java/org/apache/datasketches/kll/KllDirectFloatsSketch.java b/src/main/java/org/apache/datasketches/kll/KllDirectFloatsSketch.java
index d6122bf9e..ec057f860 100644
--- a/src/main/java/org/apache/datasketches/kll/KllDirectFloatsSketch.java
+++ b/src/main/java/org/apache/datasketches/kll/KllDirectFloatsSketch.java
@@ -187,14 +187,6 @@ void setFloatItemsArrayAt(final int index, final float value) {
     wmem.putFloat(offset, value);
   }
 
-  @Override
-  void setFloatItemsArraySubrange(final float[] srcArr, final int srcIndex, final int tgtIndex, final int numItems) {
-    if (readOnly) { kllSketchThrow(TGT_IS_READ_ONLY); }
-    final int offset =
-        DATA_START_ADR + getLevelsArray().length * Integer.BYTES + (tgtIndex + 2) * Float.BYTES;
-    wmem.putFloatArray(offset, srcArr, srcIndex, numItems);
-  }
-
   @Override
   void setLevelZeroSorted(final boolean sorted) {
     if (readOnly) { kllSketchThrow(TGT_IS_READ_ONLY); }
diff --git a/src/main/java/org/apache/datasketches/kll/KllDoublesSketch.java b/src/main/java/org/apache/datasketches/kll/KllDoublesSketch.java
index f9a35844a..6ef6a172e 100644
--- a/src/main/java/org/apache/datasketches/kll/KllDoublesSketch.java
+++ b/src/main/java/org/apache/datasketches/kll/KllDoublesSketch.java
@@ -356,11 +356,6 @@ public void update(final double value) {
   @Override //Artifact of inheritance
   void setFloatItemsArrayAt(final int index, final float value) { kllSketchThrow(MUST_NOT_CALL); }
 
-  @Override //Artifact of inheritance
-  void setFloatItemsArraySubrange(final float[] srcArr, final int srcIndex, final int tgtIndex, final int numItems) {
-    kllSketchThrow(MUST_NOT_CALL);
-  }
-
   @Override //Artifact of inheritance
   void setMaxFloatValue(final float value) { kllSketchThrow(MUST_NOT_CALL); }
 
diff --git a/src/main/java/org/apache/datasketches/kll/KllHeapFloatsSketch.java b/src/main/java/org/apache/datasketches/kll/KllHeapFloatsSketch.java
index b671da6fd..3499850e6 100644
--- a/src/main/java/org/apache/datasketches/kll/KllHeapFloatsSketch.java
+++ b/src/main/java/org/apache/datasketches/kll/KllHeapFloatsSketch.java
@@ -172,11 +172,6 @@ void incNumLevels() { } //not used here
   @Override
   void setFloatItemsArrayAt(final int index, final float value) { floatItems_[index] = value; }
 
-  @Override
-  void setFloatItemsArraySubrange(final float[] srcArr, final int srcIndex, final int tgtIndex, final int numItems) {
-    System.arraycopy(srcArr, srcIndex, floatItems_, tgtIndex, numItems);
-  }
-
   @Override
   void setLevelZeroSorted(final boolean sorted) { this.isLevelZeroSorted_ = sorted; }
 
diff --git a/src/main/java/org/apache/datasketches/kll/KllSketch.java b/src/main/java/org/apache/datasketches/kll/KllSketch.java
index 679b10675..896cb1b9d 100644
--- a/src/main/java/org/apache/datasketches/kll/KllSketch.java
+++ b/src/main/java/org/apache/datasketches/kll/KllSketch.java
@@ -506,8 +506,6 @@ final boolean isCompactSingleItem() {
 
   abstract void setFloatItemsArrayAt(int index, float value);
 
-  abstract void setFloatItemsArraySubrange(float[] srcArr, int srcIndex, int tgtIndex, int numItems);
-
   final void setLevelsArray(final int[] levelsArr) {
     if (readOnly) { kllSketchThrow(TGT_IS_READ_ONLY); }
     this.levelsArr = levelsArr;