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app/Services/BalanceLogService.php

@@ -129,7 +129,7 @@ class BalanceLogService extends BaseService
     {
         //回水相关
         if (in_array($change_type, static::$computeBackFlowChangeTypes)) {
-            BackflowService::updateOrCreate($memberId, $amount);
+            BackflowService::updateOrCreate((string)$memberId, floatval($amount));
         }