diff --git a/module/upgrade/js/consistency.ui.js b/module/upgrade/js/consistency.ui.js
index ef031d4722..992bc97d89 100644
--- a/module/upgrade/js/consistency.ui.js
+++ b/module/upgrade/js/consistency.ui.js
@@ -2,6 +2,7 @@ function updateProgressInterval()
 {
     $.get($.createLink('upgrade', 'ajaxFixConsistency', 'version=' + version));
     logOffset = 0;
+    prevLog   = '';
     interval  = setInterval(function()
     {
         var url = $.createLink('upgrade', 'ajaxGetFixLogs', 'offset=' + logOffset);
@@ -9,7 +10,11 @@ function updateProgressInterval()
         {
             logOffset = result.offset;
 
-            if(result.log) $('#logBox').append(result.log);
+            if(result.log && prevLog != result.log)
+            {
+                $('#logBox').append(result.log);
+                prevLog = result.log;
+            }
             $('#progressBox').html(result.progress + '%');
 
             let element = document.getElementById('logBox');
diff --git a/module/upgrade/model.php b/module/upgrade/model.php
index 5dcb205cf9..2e54664f01 100644
--- a/module/upgrade/model.php
+++ b/module/upgrade/model.php
@@ -612,7 +612,7 @@ class upgradeModel extends model
         /* 记录执行的sql并且记录执行结果。 */
         /* Record the executed sql and the result. */
         $sqlLines = explode(';', $fixSqls);
-        file_put_contents($logFile, count($sqlLines) . "\n", FILE_APPEND);
+        file_put_contents($logFile, count($sqlLines) . "\n");
         foreach($sqlLines as $fixSQL)
         {
             file_put_contents($logFile, $fixSQL, FILE_APPEND);