更新

server/app/adminapi/logic/stats/ConversionLogic.php

@@ -1088,8 +1088,8 @@ class ConversionLogic
             ->alias('o')
             ->whereNull('o.delete_time')
             ->where('o.status', 2)
+            // payment_time 是 DATETIME NULL；MySQL 8 严格模式下不能与空字符串比较。
             ->whereNotNull('o.payment_time')
-            ->where('o.payment_time', '<>', '')
             ->whereBetweenTime('o.payment_time', $startDateTime, $endDateTime)
             ->fieldRaw('o.creator_id AS source_admin_id, COUNT(*) AS paid_appointment_count')
             ->group('o.creator_id');