diff --git a/source/libs/parser/src/parTranslater.c b/source/libs/parser/src/parTranslater.c
index f699bfb31c..3108089232 100644
--- a/source/libs/parser/src/parTranslater.c
+++ b/source/libs/parser/src/parTranslater.c
@@ -12894,6 +12894,7 @@ static int32_t parseCsvFile(SMsgBuf* pMsgBuf, SParseContext* pParseCxt, SParseFi
       taosMemoryFreeClear(pParseFileCtx->pTag);
     }
 
+    pParseFileCtx->pTag = NULL;
     taosArrayClearEx(pParseFileCtx->aTagVals, clearTagValArrayFp);
   }