diff --git a/scripts/proto.sh b/scripts/proto.sh
index 5cb6893561..fedb3b81e1 100755
--- a/scripts/proto.sh
+++ b/scripts/proto.sh
@@ -18,7 +18,7 @@ CURRENT_DIR=`pwd`
 TIKV_CLIENT_HOME="$(cd "`dirname "$0"`"/..; pwd)"
 cd $TIKV_CLIENT_HOME
 
-kvproto_hash=70a5912413a95aa47c069044dd531efa69ad7549
+kvproto_hash=6ed99a08e262d8a32d6355dcba91cf99cb92074a
 
 raft_rs_hash=b9891b673573fad77ebcf9bbe0969cf945841926
 
diff --git a/src/main/java/org/tikv/common/region/RegionStoreClient.java b/src/main/java/org/tikv/common/region/RegionStoreClient.java
index ebcbdca071..a67575b9cb 100644
--- a/src/main/java/org/tikv/common/region/RegionStoreClient.java
+++ b/src/main/java/org/tikv/common/region/RegionStoreClient.java
@@ -951,7 +951,7 @@ public class RegionStoreClient extends AbstractRegionStoreClient {
           new KVErrorHandler<>(
               regionManager, this, resp -> resp.hasRegionError() ? resp.getRegionError() : null);
       RawCASResponse resp =
-          callWithRetry(backOffer, TikvGrpc.getRawCompareAndSetMethod(), factory, handler);
+          callWithRetry(backOffer, TikvGrpc.getRawCompareAndSwapMethod(), factory, handler);
       return rawPutIfAbsentHelper(resp);
     } finally {
       requestTimer.observeDuration();
@@ -970,10 +970,10 @@ public class RegionStoreClient extends AbstractRegionStoreClient {
     if (resp.hasRegionError()) {
       throw new RegionException(resp.getRegionError());
     }
-    if (!resp.getNotEqual()) {
+    if (resp.getSucceed()) {
       return ByteString.EMPTY;
     }
-    return resp.getValue();
+    return resp.getPreviousValue();
   }
 
   public List<KvPair> rawBatchGet(BackOffer backoffer, List<ByteString> keys) {