diff --git oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/JournalGarbageCollector.java oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/JournalGarbageCollector.java
index eaaeaee..bcfad72 100644
--- oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/JournalGarbageCollector.java
+++ oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/JournalGarbageCollector.java
@@ -164,6 +164,7 @@ public class JournalGarbageCollector {
     private void updateTailTimestamp(long gcOlderThan) {
         UpdateOp op = new UpdateOp(JOURNAL_GC_ID, true);
         op.max(TAIL_TIMESTAMP, gcOlderThan);
+        op.set(Document.ID, JOURNAL_GC_ID);
         ns.getDocumentStore().createOrUpdate(SETTINGS, op);
     }
 
diff --git oak-core/src/test/java/org/apache/jackrabbit/oak/plugins/document/JournalGCIT.java oak-core/src/test/java/org/apache/jackrabbit/oak/plugins/document/JournalGCIT.java
index ad565b1..a68dfd1 100644
--- oak-core/src/test/java/org/apache/jackrabbit/oak/plugins/document/JournalGCIT.java
+++ oak-core/src/test/java/org/apache/jackrabbit/oak/plugins/document/JournalGCIT.java
@@ -32,7 +32,6 @@ public class JournalGCIT  extends AbstractDocumentStoreTest {
         super(dsf);
     }
 
-    @Ignore("OAK-4937")
     @Test
     public void journalGCSimpleInvocation() throws Exception{
         DocumentNodeStore ns1 = new DocumentMK.Builder()