diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index fa9a36c..ab50086 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -4,9 +4,9 @@
     <option name="autoReloadType" value="ALL" />
   </component>
   <component name="ChangeListManager">
-    <list default="true" id="18dd0d68-b4b8-40db-9734-9119b5c848bd" name="更改" comment=":truck: Update url mapping">
+    <list default="true" id="18dd0d68-b4b8-40db-9734-9119b5c848bd" name="更改" comment=":bug: Fix uuid duplicate when link exists">
       <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/pkg/services/attachments.go" beforeDir="false" afterPath="$PROJECT_DIR$/pkg/services/attachments.go" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/pkg/server/attachments_api.go" beforeDir="false" afterPath="$PROJECT_DIR$/pkg/server/attachments_api.go" afterDir="false" />
     </list>
     <option name="SHOW_DIALOG" value="false" />
     <option name="HIGHLIGHT_CONFLICTS" value="true" />
@@ -71,7 +71,8 @@
     <MESSAGE value=":sparkles: Upload attachment requires permission check" />
     <MESSAGE value=":sparkles: Provide a faster check attachment exists grpc method" />
     <MESSAGE value=":truck: Update url mapping" />
-    <option name="LAST_COMMIT_MESSAGE" value=":truck: Update url mapping" />
+    <MESSAGE value=":bug: Fix uuid duplicate when link exists" />
+    <option name="LAST_COMMIT_MESSAGE" value=":bug: Fix uuid duplicate when link exists" />
   </component>
   <component name="VgoProject">
     <settings-migrated>true</settings-migrated>
diff --git a/pkg/server/attachments_api.go b/pkg/server/attachments_api.go
index 0821ec7..1777674 100644
--- a/pkg/server/attachments_api.go
+++ b/pkg/server/attachments_api.go
@@ -3,11 +3,12 @@ package server
 import (
 	"context"
 	"fmt"
-	"git.solsynth.dev/hydrogen/paperclip/pkg/grpc"
-	"git.solsynth.dev/hydrogen/passport/pkg/grpc/proto"
 	"net/url"
 	"path/filepath"
 
+	"git.solsynth.dev/hydrogen/paperclip/pkg/grpc"
+	"git.solsynth.dev/hydrogen/passport/pkg/grpc/proto"
+
 	"git.solsynth.dev/hydrogen/paperclip/pkg/database"
 	"git.solsynth.dev/hydrogen/paperclip/pkg/models"
 	"git.solsynth.dev/hydrogen/paperclip/pkg/services"
@@ -15,7 +16,6 @@ import (
 	jsoniter "github.com/json-iterator/go"
 	"github.com/samber/lo"
 	"github.com/spf13/viper"
-	"gorm.io/datatypes"
 )
 
 func openAttachment(c *fiber.Ctx) error {
@@ -101,7 +101,7 @@ func createAttachment(c *fiber.Ctx) error {
 		)
 	}
 
-	var usermeta = make(map[string]any)
+	usermeta := make(map[string]any)
 	_ = jsoniter.UnmarshalFromString(c.FormValue("metadata"), &usermeta)
 
 	tx := database.C.Begin()
@@ -110,7 +110,7 @@ func createAttachment(c *fiber.Ctx) error {
 		HashCode:    hash,
 		Alternative: c.FormValue("alt"),
 		MimeType:    c.FormValue("mimetype"),
-		Metadata:    datatypes.JSONMap(usermeta),
+		Metadata:    usermeta,
 		IsMature:    len(c.FormValue("mature")) > 0,
 		Destination: destName,
 	})
@@ -131,6 +131,40 @@ func createAttachment(c *fiber.Ctx) error {
 	return c.JSON(metadata)
 }
 
+func updateAttachmentMeta(c *fiber.Ctx) error {
+	user := c.Locals("principal").(models.Account)
+
+	var data struct {
+		Alternative string         `json:"alt"`
+		Usage       string         `json:"usage"`
+		Metadata    map[string]any `json:"metadata"`
+		IsMature    bool           `json:"is_mature"`
+	}
+
+	if err := BindAndValidate(c, &data); err != nil {
+		return err
+	}
+
+	var attachment models.Attachment
+	if err := database.C.Where(models.Attachment{
+		Uuid:      c.Params("id"),
+		AccountID: user.ID,
+	}).Error; err != nil {
+		return fiber.NewError(fiber.StatusBadRequest, err.Error())
+	}
+
+	attachment.Alternative = data.Alternative
+	attachment.Usage = data.Usage
+	attachment.Metadata = data.Metadata
+	attachment.IsMature = data.IsMature
+
+	if err := database.C.Save(&attachment).Error; err != nil {
+		return fiber.NewError(fiber.StatusBadRequest, err.Error())
+	}
+
+	return c.JSON(attachment)
+}
+
 func deleteAttachment(c *fiber.Ctx) error {
 	id, _ := c.ParamsInt("id", 0)
 	user := c.Locals("principal").(models.Account)
diff --git a/pkg/server/startup.go b/pkg/server/startup.go
index c3f004b..12ee67f 100644
--- a/pkg/server/startup.go
+++ b/pkg/server/startup.go
@@ -57,6 +57,7 @@ func NewServer() {
 		api.Get("/attachments/:id/meta", getAttachmentMeta)
 		api.Get("/attachments/:id", openAttachment)
 		api.Post("/attachments", authMiddleware, createAttachment)
+		api.Put("/attachments/:id", authMiddleware, updateAttachmentMeta)
 		api.Delete("/attachments/:id", authMiddleware, deleteAttachment)
 	}
 }