diff --git a/config/upstream_mirrors.php b/config/upstream_mirrors.php
index 7e1b3ca9..474c34a7 100644
--- a/config/upstream_mirrors.php
+++ b/config/upstream_mirrors.php
@@ -221,7 +221,7 @@ return [
             'full_reconcile_hours' => 1,
             'columns' => ['id', 'ordernum', 'originname', 'title', 'tradebody', 'company',
                 'eSignDocTemplateId', 'type', 'tradebtime', 'tradeetime', 'sendTime', 'completeTime', 'state', 'createUser'],
-            'indexes' => [['tradebody(64)', 'company(64)']],
+            'indexes' => [['tradebody', 'company']],
         ],
         'jiansun.dbo.js_supplier_linkers' => [
             'source_key' => 'jiansun', 'schema' => 'dbo', 'object' => 'js_supplier_linkers',
@@ -229,7 +229,7 @@ return [
             'full_reconcile_hours' => 24,
             'columns' => ['Id', 'sourcefrom', 'scmname', 'linker', 'linkmobile', 'linkweixin',
                 'linkjob', 'memo', 'local_created', 'local_updated'],
-            'indexes' => [['scmname(64)', 'Id']],
+            'indexes' => [['scmname', 'Id']],
         ],
         'jiansun.dbo.js_supplier_payinfo' => [
             'source_key' => 'jiansun', 'schema' => 'dbo', 'object' => 'js_supplier_payinfo',
@@ -238,7 +238,7 @@ return [
             'columns' => ['Id', 'sourcefrom', 'scmname', 'enable', 'accounttype', 'account',
                 'accountname', 'accountbank', 'memo', 'invoice', 'accountnature',
                 'creator', 'updator', 'local_created', 'local_updated'],
-            'indexes' => [['scmname(64)', 'Id']],
+            'indexes' => [['scmname', 'Id']],
         ],
         // 经营分析副本库：组织资料、订单、退款和聚水潭基础数据。
         'operations_replica.rpt.fys_companyInfo' => ['source_key' => 'operations_replica', 'schema' => 'rpt', 'object' => 'fys_companyInfo', 'target' => 'ops_fys_company_info', 'keys' => ['Id'], 'watermark' => 'updateTIme'],
diff --git a/tests/Unit/EcommerceFinance/SupplierManagementMirrorRepositoryTest.php b/tests/Unit/EcommerceFinance/SupplierManagementMirrorRepositoryTest.php
index be598fef..709e82d6 100644
--- a/tests/Unit/EcommerceFinance/SupplierManagementMirrorRepositoryTest.php
+++ b/tests/Unit/EcommerceFinance/SupplierManagementMirrorRepositoryTest.php
@@ -8,6 +8,7 @@ use Illuminate\Support\Facades\Schema;
 use Modules\EcommerceFinance\Repositories\GenericBusinessMirrorRepository;
 use Modules\EcommerceFinance\Repositories\SupplierManagementMirrorRepository;
 use Modules\EcommerceFinance\Services\BusinessMirrorDatasetRegistry;
+use Modules\EcommerceFinance\Services\BusinessMirrorSchemaManager;
 use Tests\TestCase;
 
 class SupplierManagementMirrorRepositoryTest extends TestCase
@@ -49,6 +50,27 @@ class SupplierManagementMirrorRepositoryTest extends TestCase
         $this->assertSame([1, 2], array_map(fn ($row) => $row->Id, iterator_to_array($this->repository->exportRows($filters))));
     }
 
+    public function test_related_mirror_indexes_can_be_built_from_the_50_character_source_fields(): void
+    {
+        $registry = new BusinessMirrorDatasetRegistry();
+        foreach (SupplierManagementMirrorRepository::RELATED as $key) {
+            $dataset = $registry->get($key);
+            foreach ($registry->columnSelection($key) as $position => $name) {
+                DB::table('upstream_schema_columns')->insert([
+                    'source_key' => 'jiansun', 'schema_name' => 'dbo', 'object_name' => $dataset->sourceObject(),
+                    'object_type' => 'VIEW', 'column_name' => $name, 'ordinal_position' => $position + 1,
+                    'data_type' => strtolower($name) === 'id' ? 'int' : 'varchar', 'max_length' => 50,
+                    'is_nullable' => true, 'synchronized_at' => now(),
+                    'created_at' => now(), 'updated_at' => now(),
+                ]);
+            }
+            (new BusinessMirrorSchemaManager())->ensure($dataset);
+            $indexes = collect(Schema::connection('business_mirror')->getIndexes($dataset->targetTable()))
+                ->pluck('columns')->all();
+            foreach ($dataset->indexDefinitions() as $columns) $this->assertContains($columns, $indexes);
+        }
+    }
+
     public function test_details_do_not_mix_suppliers_or_contract_signing_companies(): void
     {
         foreach (SupplierManagementMirrorRepository::RELATED as $key) $this->ready($key);