无订阅 支付后出现两个订阅

initialize/migrate/database/02138_signature_config.down.sql

@@ -0,0 +1,4 @@
+DELETE
+FROM `system`
+WHERE `category` = 'signature'
+  AND `key` = 'EnableSignature';

initialize/migrate/database/02138_signature_config.up.sql

@@ -0,0 +1,14 @@
+INSERT INTO `system` (`category`, `key`, `value`, `type`, `desc`, `created_at`, `updated_at`)
+SELECT 'signature',
+       'EnableSignature',
+       'false',
+       'bool',
+       'Enable signature verification for public APIs',
+       NOW(3),
+       NOW(3)
+WHERE NOT EXISTS (
+    SELECT 1
+    FROM `system`
+    WHERE `category` = 'signature'
+      AND `key` = 'EnableSignature'
+);