diff --git a/database/migrations/2026_07_02_150000_fix_user_venue_foreign_key_to_venues.php b/database/migrations/2026_07_02_150000_fix_user_venue_foreign_key_to_venues.php
new file mode 100644
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+++ b/database/migrations/2026_07_02_150000_fix_user_venue_foreign_key_to_venues.php
@@ -0,0 +1,79 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\DB;
+use Illuminate\Support\Facades\Schema;
+
+/**
+ * 修复生产库 user_venue.venue_id 外键仍指向 venues1203 的问题。
+ *
+ * 现象：Laravel 校验 exists:venues,id 通过，但 sync 写入 user_venue 时触发
+ * user_venue_venue_id_foreign → venues1203 约束失败（新场馆 id 不在旧表中）。
+ */
+return new class extends Migration
+{
+    /** @var list<string> */
+    private array $venueFkTables = [
+        'user_venue',
+        'activities',
+        'reservations',
+        'blacklists',
+        'venue_audit_logs',
+        'ticket_grab_event_venue',
+        'ticket_grab_venue_release_days',
+        'verify_portal_credentials',
+    ];
+
+    public function up(): void
+    {
+        if (! Schema::hasTable('venues')) {
+            return;
+        }
+
+        foreach ($this->venueFkTables as $table) {
+            $this->retargetVenueForeignKey($table);
+        }
+    }
+
+    public function down(): void
+    {
+        // 不可逆：旧表 venues1203 可能已废弃，不回滚外键指向。
+    }
+
+    private function retargetVenueForeignKey(string $table): void
+    {
+        if (! Schema::hasTable($table) || ! Schema::hasColumn($table, 'venue_id')) {
+            return;
+        }
+
+        $fk = DB::selectOne(
+            'SELECT CONSTRAINT_NAME, REFERENCED_TABLE_NAME
+             FROM information_schema.KEY_COLUMN_USAGE
+             WHERE TABLE_SCHEMA = DATABASE()
+               AND TABLE_NAME = ?
+               AND COLUMN_NAME = ?
+               AND REFERENCED_TABLE_NAME IS NOT NULL
+             LIMIT 1',
+            [$table, 'venue_id']
+        );
+
+        if (! $fk || $fk->REFERENCED_TABLE_NAME === 'venues') {
+            return;
+        }
+
+        DB::statement(
+            "DELETE t FROM `{$table}` t
+             LEFT JOIN venues v ON v.id = t.venue_id
+             WHERE v.id IS NULL"
+        );
+
+        Schema::table($table, function (Blueprint $blueprint) {
+            $blueprint->dropForeign(['venue_id']);
+        });
+
+        Schema::table($table, function (Blueprint $blueprint) {
+            $blueprint->foreign('venue_id')->references('id')->on('venues')->cascadeOnDelete();
+        });
+    }
+};