Index: oak-jcr/src/main/java/org/apache/jackrabbit/oak/jcr/version/VersionHistoryImpl.java
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
diff --git a/oak-jcr/src/main/java/org/apache/jackrabbit/oak/jcr/version/VersionHistoryImpl.java b/oak-jcr/src/main/java/org/apache/jackrabbit/oak/jcr/version/VersionHistoryImpl.java
--- a/oak-jcr/src/main/java/org/apache/jackrabbit/oak/jcr/version/VersionHistoryImpl.java	(revision 3166f8bc7eb48faea423c3adfd779eab5f303aa3)
+++ b/oak-jcr/src/main/java/org/apache/jackrabbit/oak/jcr/version/VersionHistoryImpl.java	(revision 0abdbc25d7f0c19f548800df3914ebf6ff5261f4)
@@ -233,6 +233,11 @@
             UnsupportedRepositoryOperationException, VersionException,
             RepositoryException {
 
+        Version version = this.getVersion(versionName);
+        List<String> labels = Arrays.asList(getVersionLabels(version));
+        for(String label:labels) {
+            removeVersionLabel(label);
+        }
         sessionDelegate.performVoid(new SessionOperation<Void>("removeVersion", true) {
             @Override
             public void performVoid() throws RepositoryException {
Index: oak-jcr/src/test/java/org/apache/jackrabbit/oak/jcr/version/VersionHistoryTest.java
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
diff --git a/oak-jcr/src/test/java/org/apache/jackrabbit/oak/jcr/version/VersionHistoryTest.java b/oak-jcr/src/test/java/org/apache/jackrabbit/oak/jcr/version/VersionHistoryTest.java
--- a/oak-jcr/src/test/java/org/apache/jackrabbit/oak/jcr/version/VersionHistoryTest.java	(revision 3166f8bc7eb48faea423c3adfd779eab5f303aa3)
+++ b/oak-jcr/src/test/java/org/apache/jackrabbit/oak/jcr/version/VersionHistoryTest.java	(revision 0abdbc25d7f0c19f548800df3914ebf6ff5261f4)
@@ -159,4 +159,42 @@
 
         assertFalse("VersionHistory node should have disappeared", superuser.itemExists(vhrpath));
     }
+    // see OAK-9891
+    public void testRemoveVersionLabelWithRemovalOfVersion() throws RepositoryException{
+        int createVersions = 3;
+        Node n = testRootNode.addNode(nodeName1, testNodeType);
+        n.addMixin(mixVersionable);
+        superuser.save();
+
+        VersionManager vm = superuser.getWorkspace().getVersionManager();
+        for (int i = 0; i < createVersions; i++) {
+            vm.checkout(n.getPath());
+            vm.checkin(n.getPath());
+        }
+        superuser.save();
+
+        VersionHistory vhr = vm.getVersionHistory(n.getPath());
+        // initialize versionName
+        String versionName= "";
+        VersionIterator allversions = vhr.getAllVersions();
+        int count=0;
+        while (allversions.hasNext()) {
+            Version version = allversions.nextVersion();
+            if(count == 1) {
+                versionName=version.getName();
+            }
+            count++;
+        }
+        vhr.addVersionLabel(versionName,"Label_" + versionName + "_0",false);
+        vhr.addVersionLabel(versionName,"Label_" + versionName + "_1",false);
+        vhr.addVersionLabel(versionName,"Label_" + versionName + "_2",false);
+        superuser.save();
+        vhr.removeVersion(versionName);
+        superuser.save();
+
+        assertEquals("version label should not exist", false, vhr.hasVersionLabel("Label_" + versionName + "_0"));
+        assertEquals("version label should not exist", false, vhr.hasVersionLabel("Label_" + versionName + "_1"));
+        assertEquals("version label should not exist", false, vhr.hasVersionLabel("Label_" + versionName + "_2"));
+
+    }
 }
\ No newline at end of file