diff --git a/tencentcloud/services/cls/resource_tc_cls_machine_group.go b/tencentcloud/services/cls/resource_tc_cls_machine_group.go
index 689da4f2d3..03d476df5c 100644
--- a/tencentcloud/services/cls/resource_tc_cls_machine_group.go
+++ b/tencentcloud/services/cls/resource_tc_cls_machine_group.go
@@ -67,13 +67,11 @@ func ResourceTencentCloudClsMachineGroup() *schema.Resource {
 			"update_start_time": {
 				Type:        schema.TypeString,
 				Optional:    true,
-				ForceNew:    true,
 				Description: "Update start time. We recommend you update LogListener during off-peak hours.",
 			},
 			"update_end_time": {
 				Type:        schema.TypeString,
 				Optional:    true,
-				ForceNew:    true,
 				Description: "Update end time. We recommend you update LogListener during off-peak hours.",
 			},
 			"service_logging": {
diff --git a/website/docs/r/cls_machine_group.html.markdown b/website/docs/r/cls_machine_group.html.markdown
index 220b813f50..bb3b1bdaaf 100644
--- a/website/docs/r/cls_machine_group.html.markdown
+++ b/website/docs/r/cls_machine_group.html.markdown
@@ -42,8 +42,8 @@ The following arguments are supported:
 * `auto_update` - (Optional, Bool, ForceNew) Whether to enable automatic update for the machine group.
 * `service_logging` - (Optional, Bool) Whether to enable the service log to record the logs generated by the LogListener service itself. After it is enabled, the internal logset cls_service_logging and the loglistener_status, loglistener_alarm, and loglistener_business log topics will be created, which will not incur fees.
 * `tags` - (Optional, Map) Tag description list. Up to 10 tag key-value pairs are supported and must be unique.
-* `update_end_time` - (Optional, String, ForceNew) Update end time. We recommend you update LogListener during off-peak hours.
-* `update_start_time` - (Optional, String, ForceNew) Update start time. We recommend you update LogListener during off-peak hours.
+* `update_end_time` - (Optional, String) Update end time. We recommend you update LogListener during off-peak hours.
+* `update_start_time` - (Optional, String) Update start time. We recommend you update LogListener during off-peak hours.
 
 The `machine_group_type` object supports the following: