diff --git a/frontend/app/(main)/COMPANY_16/sales/estimate/page.tsx b/frontend/app/(main)/COMPANY_16/sales/estimate/page.tsx
index f176ccad..2f38b0ed 100644
--- a/frontend/app/(main)/COMPANY_16/sales/estimate/page.tsx
+++ b/frontend/app/(main)/COMPANY_16/sales/estimate/page.tsx
@@ -876,7 +876,7 @@ export default function SalesEstimatePage() {
 
       {/* S/N 관리 — wace fn_openItemSnPopup (테이블 + 연속번호생성) */}
       <Dialog open={serialDialogOpen} onOpenChange={setSerialDialogOpen}>
-        <DialogContent className="max-w-2xl">
+        <DialogContent className="max-w-2xl" onInteractOutside={(e) => e.preventDefault()}>
           <DialogHeader>
             <DialogTitle className="text-center">S/N 관리</DialogTitle>
             <DialogDescription className="sr-only">시리얼 번호 추가/삭제 및 연속번호 생성</DialogDescription>
@@ -925,7 +925,7 @@ export default function SalesEstimatePage() {
 
       {/* 연속번호 생성 — wace fn_openItemSequentialSnPopup */}
       <Dialog open={seqDialogOpen} onOpenChange={setSeqDialogOpen}>
-        <DialogContent className="max-w-sm">
+        <DialogContent className="max-w-sm" onInteractOutside={(e) => e.preventDefault()}>
           <DialogHeader>
             <DialogTitle>연속번호 생성</DialogTitle>
             <DialogDescription className="sr-only">시작번호와 생성개수로 연속 S/N 일괄 추가</DialogDescription>
diff --git a/frontend/app/(main)/COMPANY_16/sales/order/page.tsx b/frontend/app/(main)/COMPANY_16/sales/order/page.tsx
index b7a497b5..68b3a852 100644
--- a/frontend/app/(main)/COMPANY_16/sales/order/page.tsx
+++ b/frontend/app/(main)/COMPANY_16/sales/order/page.tsx
@@ -767,7 +767,7 @@ export default function SalesOrderPage() {
 
       {/* S/N 관리 — wace fn_openItemSnPopup */}
       <Dialog open={serialDialogOpen} onOpenChange={setSerialDialogOpen}>
-        <DialogContent className="max-w-2xl">
+        <DialogContent className="max-w-2xl" onInteractOutside={(e) => e.preventDefault()}>
           <DialogHeader>
             <DialogTitle className="text-center">S/N 관리</DialogTitle>
             <DialogDescription className="sr-only">시리얼 번호 추가/삭제 및 연속번호 생성</DialogDescription>
@@ -814,7 +814,7 @@ export default function SalesOrderPage() {
 
       {/* 연속번호 생성 — wace fn_openItemSequentialSnPopup */}
       <Dialog open={seqDialogOpen} onOpenChange={setSeqDialogOpen}>
-        <DialogContent className="max-w-sm">
+        <DialogContent className="max-w-sm" onInteractOutside={(e) => e.preventDefault()}>
           <DialogHeader>
             <DialogTitle>연속번호 생성</DialogTitle>
             <DialogDescription className="sr-only">시작번호와 생성개수로 연속 S/N 일괄 추가</DialogDescription>