diff --git a/database/migrations/2026_03_11_100000_drop_broken_foreign_keys_from_codebridge.php b/database/migrations/2026_03_11_100000_drop_broken_foreign_keys_from_codebridge.php
new file mode 100644
index 0000000..d98e0c1
--- /dev/null
+++ b/database/migrations/2026_03_11_100000_drop_broken_foreign_keys_from_codebridge.php
@@ -0,0 +1,109 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Support\Facades\DB;
+
+/**
+ * codebridge DB 분리 후 남은 깨진 FK 제약조건 제거
+ *
+ * 원인: 2026_03_09_230000_drop_codebridge_tables_from_sam 마이그레이션으로
+ * sam → codebridge로 테이블을 이동했으나, codebridge 테이블의 FK 제약조건이
+ * 여전히 sam에 남아있는 users, tenants, departments 등을 참조하고 있었음.
+ *
+ * 영향: esign_field_templates 등에서 INSERT 시 FK violation 발생
+ */
+return new class extends Migration
+{
+    public function up(): void
+    {
+        $connection = 'codebridge';
+
+        // 참조 대상: users (27개)
+        $this->dropForeignKeySafe($connection, 'admin_api_bookmarks', 'admin_api_bookmarks_user_id_foreign');
+        $this->dropForeignKeySafe($connection, 'admin_api_deprecations', 'admin_api_deprecations_created_by_foreign');
+        $this->dropForeignKeySafe($connection, 'admin_api_environments', 'admin_api_environments_user_id_foreign');
+        $this->dropForeignKeySafe($connection, 'admin_api_histories', 'admin_api_histories_user_id_foreign');
+        $this->dropForeignKeySafe($connection, 'admin_api_templates', 'admin_api_templates_user_id_foreign');
+        $this->dropForeignKeySafe($connection, 'admin_meeting_logs', 'admin_meeting_logs_user_id_foreign');
+        $this->dropForeignKeySafe($connection, 'admin_pm_daily_logs', 'admin_pm_daily_logs_deleted_by_foreign');
+        $this->dropForeignKeySafe($connection, 'admin_pm_daily_logs', 'admin_pm_daily_logs_created_by_foreign');
+        $this->dropForeignKeySafe($connection, 'admin_pm_daily_logs', 'admin_pm_daily_logs_updated_by_foreign');
+        $this->dropForeignKeySafe($connection, 'admin_pm_issues', 'admin_pm_issues_assignee_id_foreign');
+        $this->dropForeignKeySafe($connection, 'ai_token_usages', 'ai_token_usages_created_by_foreign');
+        $this->dropForeignKeySafe($connection, 'business_income_payments', 'business_income_payments_confirmed_by_foreign');
+        $this->dropForeignKeySafe($connection, 'business_income_payments', 'business_income_payments_user_id_foreign');
+        $this->dropForeignKeySafe($connection, 'business_income_payments', 'business_income_payments_updated_by_foreign');
+        $this->dropForeignKeySafe($connection, 'business_income_payments', 'business_income_payments_created_by_foreign');
+        $this->dropForeignKeySafe($connection, 'business_income_payments', 'business_income_payments_deleted_by_foreign');
+        $this->dropForeignKeySafe($connection, 'demo_links', 'demo_links_created_by_foreign');
+        $this->dropForeignKeySafe($connection, 'esign_contracts', 'esign_contracts_updated_by_foreign');
+        $this->dropForeignKeySafe($connection, 'esign_contracts', 'esign_contracts_deleted_by_foreign');
+        $this->dropForeignKeySafe($connection, 'esign_contracts', 'esign_contracts_created_by_foreign');
+        $this->dropForeignKeySafe($connection, 'esign_field_templates', 'esign_field_templates_created_by_foreign');
+        $this->dropForeignKeySafe($connection, 'login_tokens', 'login_tokens_user_id_foreign');
+        $this->dropForeignKeySafe($connection, 'sales_contract_products', 'sales_contract_products_created_by_foreign');
+        $this->dropForeignKeySafe($connection, 'sales_manager_documents', 'sales_manager_documents_uploaded_by_foreign');
+        $this->dropForeignKeySafe($connection, 'sales_manager_documents', 'sales_manager_documents_user_id_foreign');
+        $this->dropForeignKeySafe($connection, 'sales_scenario_checklists', 'sales_scenario_checklists_user_id_foreign');
+        $this->dropForeignKeySafe($connection, 'tenant_prospects', 'tenant_prospects_converted_by_foreign');
+        $this->dropForeignKeySafe($connection, 'tenant_prospects', 'tenant_prospects_registered_by_foreign');
+
+        // 참조 대상: tenants (16개)
+        $this->dropForeignKeySafe($connection, 'account_codes', 'account_codes_tenant_id_foreign');
+        $this->dropForeignKeySafe($connection, 'admin_meeting_logs', 'admin_meeting_logs_tenant_id_foreign');
+        $this->dropForeignKeySafe($connection, 'admin_pm_daily_logs', 'admin_pm_daily_logs_tenant_id_foreign');
+        $this->dropForeignKeySafe($connection, 'ai_token_usages', 'ai_token_usages_tenant_id_foreign');
+        $this->dropForeignKeySafe($connection, 'barobill_bank_sync_status', 'barobill_bank_sync_status_tenant_id_foreign');
+        $this->dropForeignKeySafe($connection, 'barobill_bank_transaction_splits', 'barobill_bank_transaction_splits_tenant_id_foreign');
+        $this->dropForeignKeySafe($connection, 'barobill_bank_transactions', 'barobill_bank_transactions_tenant_id_foreign');
+        $this->dropForeignKeySafe($connection, 'barobill_card_transaction_hides', 'barobill_card_transaction_hides_tenant_id_foreign');
+        $this->dropForeignKeySafe($connection, 'barobill_members', 'barobill_members_tenant_id_foreign');
+        $this->dropForeignKeySafe($connection, 'business_income_payments', 'business_income_payments_tenant_id_foreign');
+        $this->dropForeignKeySafe($connection, 'esign_audit_logs', 'esign_audit_logs_tenant_id_foreign');
+        $this->dropForeignKeySafe($connection, 'esign_contracts', 'esign_contracts_tenant_id_foreign');
+        $this->dropForeignKeySafe($connection, 'esign_field_templates', 'esign_field_templates_tenant_id_foreign');
+        $this->dropForeignKeySafe($connection, 'esign_sign_fields', 'esign_sign_fields_tenant_id_foreign');
+        $this->dropForeignKeySafe($connection, 'esign_signers', 'esign_signers_tenant_id_foreign');
+        $this->dropForeignKeySafe($connection, 'expense_accounts', 'expense_accounts_tenant_id_foreign');
+        $this->dropForeignKeySafe($connection, 'hometax_invoices', 'hometax_invoices_tenant_id_foreign');
+        $this->dropForeignKeySafe($connection, 'sales_contract_products', 'sales_contract_products_tenant_id_foreign');
+        $this->dropForeignKeySafe($connection, 'sales_manager_documents', 'sales_manager_documents_tenant_id_foreign');
+        $this->dropForeignKeySafe($connection, 'sales_scenario_checklists', 'sales_scenario_checklists_tenant_id_foreign');
+        $this->dropForeignKeySafe($connection, 'tenant_prospects', 'tenant_prospects_tenant_id_foreign');
+
+        // 참조 대상: departments (1개)
+        $this->dropForeignKeySafe($connection, 'admin_pm_issues', 'admin_pm_issues_department_id_foreign');
+
+        // 참조 대상: processes (1개)
+        $this->dropForeignKeySafe($connection, 'equipment_process', 'equipment_process_process_id_foreign');
+
+        // 참조 대상: prospects (1개)
+        $this->dropForeignKeySafe($connection, 'demo_links', 'demo_links_prospect_id_foreign');
+
+        // 참조 대상: clients (1개)
+        $this->dropForeignKeySafe($connection, 'expense_accounts', 'expense_accounts_vendor_id_foreign');
+
+        // 참조 대상: barobill_card_transactions (1개)
+        $this->dropForeignKeySafe($connection, 'barobill_card_transaction_amount_logs', 'bb_amount_log_trans_fk');
+    }
+
+    public function down(): void
+    {
+        // 복원 불필요: 크로스 DB FK는 의도적으로 제거한 것
+    }
+
+    private function dropForeignKeySafe(string $connection, string $table, string $foreignKey): void
+    {
+        $exists = DB::connection($connection)->select("
+            SELECT 1 FROM information_schema.TABLE_CONSTRAINTS
+            WHERE TABLE_SCHEMA = DATABASE()
+              AND TABLE_NAME = ?
+              AND CONSTRAINT_NAME = ?
+              AND CONSTRAINT_TYPE = 'FOREIGN KEY'
+        ", [$table, $foreignKey]);
+
+        if (! empty($exists)) {
+            DB::connection($connection)->statement("ALTER TABLE `{$table}` DROP FOREIGN KEY `{$foreignKey}`");
+        }
+    }
+};