diff --git a/src/Model.php b/src/Model.php
index f1006139..172ce581 100644
--- a/src/Model.php
+++ b/src/Model.php
@@ -690,12 +690,12 @@ protected function insertData(string $sequence = null): bool
 
         // 时间戳自动写入
         if ($this->autoWriteTimestamp) {
-            if ($this->createTime && !isset($data[$this->createTime])) {
-                $data[$this->createTime] = $this->autoWriteTimestamp();
+            if ($this->createTime && !array_key_exists($this->createTime, $data)) {
+                $data[$this->createTime]       = $this->autoWriteTimestamp();
                 $this->data[$this->createTime] = $data[$this->createTime];
             }
 
-            if ($this->updateTime && !isset($data[$this->updateTime])) {
+            if ($this->updateTime && !array_key_exists($this->updateTime, $data)) {
                 $data[$this->updateTime] = $this->autoWriteTimestamp();
                 $this->data[$this->updateTime] = $data[$this->updateTime];
             }