diff --git a/client/index.go b/client/index.go
index 6f725aae..6b717136 100644
--- a/client/index.go
+++ b/client/index.go
@@ -90,11 +90,6 @@ func (c *GrpcClient) CreateIndex(ctx context.Context, collName string, fieldName
 		return err
 	}
 
-	flushErr := c.Flush(ctx, collName, true)
-	if flushErr != nil {
-		return flushErr
-	}
-
 	idxDef := getIndexDef(opts...)
 
 	req := &milvuspb.CreateIndexRequest{
diff --git a/client/index_test.go b/client/index_test.go
index eea34bc8..f1ca827f 100644
--- a/client/index_test.go
+++ b/client/index_test.go
@@ -41,17 +41,6 @@ func TestGrpcClientCreateIndex(t *testing.T) {
 		assert.Nil(t, c.CreateIndex(ctx, testCollectionName, fieldName, idx, true))
 	})
 
-	t.Run("test flush err", func(t *testing.T) {
-		mockServer.SetInjection(MFlush, func(_ context.Context, raw proto.Message) (proto.Message, error) {
-			resp := &milvuspb.FlushResponse{}
-			s, err := BadRequestStatus()
-			resp.Status = s
-			return resp, err
-		})
-		defer mockServer.DelInjection(MFlush)
-		assert.NotNil(t, c.CreateIndex(ctx, testCollectionName, fieldName, idx, false))
-	})
-
 	t.Run("test sync create index", func(t *testing.T) {
 		buildTime := rand.Intn(900) + 100
 		start := time.Now()