diff --git a/app/Services/Sales/SalesManagerService.php b/app/Services/Sales/SalesManagerService.php
index a629451d..80a90e3a 100644
--- a/app/Services/Sales/SalesManagerService.php
+++ b/app/Services/Sales/SalesManagerService.php
@@ -110,16 +110,19 @@ public function updateSalesPartner(User $user, array $data, array $documents = [
             }
 
             // 2-1. 사업자 정보 업데이트
-            if (array_key_exists('company_name', $data) || array_key_exists('biz_no', $data) || array_key_exists('address', $data)) {
-                $sp = SalesPartner::firstOrNew(['user_id' => $user->id]);
+            $hasBizInfo = !empty($data['company_name']) || !empty($data['biz_no']) || !empty($data['address']);
+            $existingSp = SalesPartner::where('user_id', $user->id)->first();
+
+            if ($hasBizInfo || $existingSp) {
+                $sp = $existingSp ?? new SalesPartner(['user_id' => $user->id]);
                 if (!$sp->exists) {
                     $sp->partner_code = SalesPartner::generatePartnerCode();
                     $sp->partner_type = 'individual';
                     $sp->status = 'active';
                 }
-                $sp->company_name = $data['company_name'] ?? $sp->company_name;
-                $sp->biz_no = $data['biz_no'] ?? $sp->biz_no;
-                $sp->address = $data['address'] ?? $sp->address;
+                $sp->company_name = $data['company_name'] ?? null;
+                $sp->biz_no = $data['biz_no'] ?? null;
+                $sp->address = $data['address'] ?? null;
                 $sp->save();
             }