diff --git a/jme3-core/src/main/java/com/jme3/shader/bufferobject/BufferObject.java b/jme3-core/src/main/java/com/jme3/shader/bufferobject/BufferObject.java
index f83c68c1aa..f40cbfd26d 100644
--- a/jme3-core/src/main/java/com/jme3/shader/bufferobject/BufferObject.java
+++ b/jme3-core/src/main/java/com/jme3/shader/bufferobject/BufferObject.java
@@ -269,7 +269,9 @@ public void markAllRegionsDirty() {
 
     @Override
     public void resetObject() {
-        this.id = -1;
+        this.id = INVALID_ID;
+        // A replacement GPU allocation needs all retained CPU data.
+        setUpdateNeeded();
     }
 
     @Override
diff --git a/jme3-core/src/test/java/com/jme3/shader/bufferobject/BufferObjectResetTest.java b/jme3-core/src/test/java/com/jme3/shader/bufferobject/BufferObjectResetTest.java
new file mode 100644
index 0000000000..1dbff34116
--- /dev/null
+++ b/jme3-core/src/test/java/com/jme3/shader/bufferobject/BufferObjectResetTest.java
@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 2009-2026 jMonkeyEngine
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ *
+ * * Neither the name of 'jMonkeyEngine' nor the names of its contributors
+ *   may be used to endorse or promote products derived from this software
+ *   without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
+ * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+package com.jme3.shader.bufferobject;
+
+import java.util.Arrays;
+import org.junit.jupiter.api.Test;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+class BufferObjectResetTest {
+    @Test
+    void bufferObjectResetMarksItsDataAndRegionsForUpload() {
+        BufferObject buffer = new BufferObject();
+        buffer.setId(74);
+        buffer.setRegions(Arrays.asList(new BufferRegion(0, 3), new BufferRegion(4, 7)));
+        buffer.getRegion(0).clearDirty();
+        buffer.getRegion(1).clearDirty();
+        buffer.clearUpdateNeeded();
+
+        buffer.resetObject();
+
+        assertTrue(buffer.isUpdateNeeded());
+        assertTrue(buffer.getRegion(0).isDirty());
+        assertTrue(buffer.getRegion(1).isDirty());
+    }
+
+}