diff --git a/java/com/google/gerrit/entities/Comment.java b/java/com/google/gerrit/entities/Comment.java
index 65c642c..55d739a 100644
--- a/java/com/google/gerrit/entities/Comment.java
+++ b/java/com/google/gerrit/entities/Comment.java
@@ -229,12 +229,6 @@
   public String serverId;
   public boolean unresolved;
 
-  /**
-   * Whether the comment was parsed from a JSON representation (false) or the legacy custom notes
-   * format (true).
-   */
-  public transient boolean legacyFormat;
-
   public Comment(Comment c) {
     this(
         new Key(c.key),
diff --git a/java/com/google/gerrit/server/restapi/change/GetDiff.java b/java/com/google/gerrit/server/restapi/change/GetDiff.java
index 736925d..a6536ce 100644
--- a/java/com/google/gerrit/server/restapi/change/GetDiff.java
+++ b/java/com/google/gerrit/server/restapi/change/GetDiff.java
@@ -146,7 +146,8 @@
     PatchSet.Id pId = resource.getPatchKey().patchSetId();
     String fileName = resource.getPatchKey().fileName();
     logger.atFine().log(
-        "patchSetId = %d, fileName = %s, base = %s", pId.get(), fileName, base, parentNum);
+        "patchSetId = %d, fileName = %s, base = %s, parentNum = %d",
+        pId.get(), fileName, base, parentNum);
     ChangeNotes notes = resource.getRevision().getNotes();
     if (base != null) {
       RevisionResource baseResource =
diff --git a/javatests/com/google/gerrit/acceptance/server/change/CommentsIT.java b/javatests/com/google/gerrit/acceptance/server/change/CommentsIT.java
index d85a07b..b32ce35 100644
--- a/javatests/com/google/gerrit/acceptance/server/change/CommentsIT.java
+++ b/javatests/com/google/gerrit/acceptance/server/change/CommentsIT.java
@@ -59,7 +59,6 @@
 import java.sql.Timestamp;
 import java.util.ArrayList;
 import java.util.Arrays;
-import java.util.Collection;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -1002,20 +1001,6 @@
     assertThat(getChangeSortedComments(id.get())).hasSize(3);
   }
 
-  @Test
-  public void jsonCommentHasLegacyFormatFalse() throws Exception {
-    PushOneCommit.Result result = createChange();
-    Change.Id changeId = result.getChange().getId();
-    addComment(result.getChangeId(), "comment");
-
-    Collection<com.google.gerrit.entities.Comment> comments =
-        notesFactory.createChecked(project, changeId).getComments().values();
-    assertThat(comments).hasSize(1);
-    com.google.gerrit.entities.Comment comment = comments.iterator().next();
-    assertThat(comment.message).isEqualTo("comment");
-    assertThat(comment.legacyFormat).isFalse();
-  }
-
   private List<CommentInfo> getRevisionComments(String changeId, String revId) throws Exception {
     return getPublishedComments(changeId, revId).values().stream()
         .flatMap(List::stream)
diff --git a/javatests/com/google/gerrit/server/notedb/ChangeNotesStateTest.java b/javatests/com/google/gerrit/server/notedb/ChangeNotesStateTest.java
index 0d7f2bd..6ece894 100644
--- a/javatests/com/google/gerrit/server/notedb/ChangeNotesStateTest.java
+++ b/javatests/com/google/gerrit/server/notedb/ChangeNotesStateTest.java
@@ -938,7 +938,6 @@
                 .put("revId", String.class)
                 .put("serverId", String.class)
                 .put("unresolved", boolean.class)
-                .put("legacyFormat", boolean.class)
                 .build());
   }