diff --git a/CHANGELOG b/CHANGELOG
index 4e4ef3c16..3ff0e80f8 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,6 @@
+2021-01-07 Version: patch
+- Generated 2019-09-10 for `waf-openapi`.
+
 2021-01-06 Version: patch
 - DescribeAvailableResource.
 
diff --git a/waf-openapi/include/alibabacloud/waf-openapi/model/DescribeWafSourceIpSegmentRequest.h b/waf-openapi/include/alibabacloud/waf-openapi/model/DescribeWafSourceIpSegmentRequest.h
index 2b7b92d85..bf762f5bd 100644
--- a/waf-openapi/include/alibabacloud/waf-openapi/model/DescribeWafSourceIpSegmentRequest.h
+++ b/waf-openapi/include/alibabacloud/waf-openapi/model/DescribeWafSourceIpSegmentRequest.h
@@ -43,15 +43,12 @@ namespace AlibabaCloud
 				void setSourceIp(const std::string& sourceIp);
 				std::string getLang()const;
 				void setLang(const std::string& lang);
-				std::string getRegion()const;
-				void setRegion(const std::string& region);
 
             private:
 				std::string resourceGroupId_;
 				std::string instanceId_;
 				std::string sourceIp_;
 				std::string lang_;
-				std::string region_;
 
 			};
 		}
diff --git a/waf-openapi/src/model/DescribeWafSourceIpSegmentRequest.cc b/waf-openapi/src/model/DescribeWafSourceIpSegmentRequest.cc
index cb3d73188..83ffba24b 100644
--- a/waf-openapi/src/model/DescribeWafSourceIpSegmentRequest.cc
+++ b/waf-openapi/src/model/DescribeWafSourceIpSegmentRequest.cc
@@ -71,14 +71,3 @@ void DescribeWafSourceIpSegmentRequest::setLang(const std::string& lang)
 	setParameter("Lang", lang);
 }
 
-std::string DescribeWafSourceIpSegmentRequest::getRegion()const
-{
-	return region_;
-}
-
-void DescribeWafSourceIpSegmentRequest::setRegion(const std::string& region)
-{
-	region_ = region;
-	setParameter("Region", region);
-}
-