diff --git a/proto/backend.proto b/proto/backend.proto
index 7c23a4a74..51f2089b3 100644
--- a/proto/backend.proto
+++ b/proto/backend.proto
@@ -1004,7 +1004,7 @@ message RevlogEntry {
         LEARNING = 0;
         REVIEW = 1;
         RELEARNING = 2;
-        EARLY_REVIEW = 4;
+        EARLY_REVIEW = 3;
     }
     int64 id = 1;
     int64 cid = 2;