1 files changed, 2 insertions, 1 deletions
diff --git a/lib/PublicInbox/Search.pm b/lib/PublicInbox/Search.pm
index d7679413..b9f283fb 100644
--- a/lib/PublicInbox/Search.pm
+++ b/lib/PublicInbox/Search.pm
@@ -22,7 +22,8 @@ use constant {
          # 1 - subject_path is lower-cased
          # 2 - subject_path is mid_compressed in the index, only
          # 3 - message-ID is compressed if it includes '%' (hack!)
-        SCHEMA_VERSION => 3,
+        # 4 - change "Re: " normalization, avoid circular Reference ghosts
+        SCHEMA_VERSION => 4,
          QP_FLAGS => FLAG_PHRASE|FLAG_BOOLEAN|FLAG_LOVEHATE|FLAG_WILDCARD,
  };