diff --git a/src/handlers/sheets.go b/src/handlers/sheets.go
index 943cd5b..4dc9d1c 100644
--- a/src/handlers/sheets.go
+++ b/src/handlers/sheets.go
@@ -10,7 +10,6 @@ import (
 	"sheetless-server/database"
 	"sheetless-server/models"
 	"sheetless-server/utils"
-	"strconv"
 	"time"
 
 	"github.com/gin-gonic/gin"
@@ -27,12 +26,6 @@ func init() {
 }
 
 func UploadSheet(c *gin.Context) {
-	userID, exists := c.Get("user_id")
-	if !exists {
-		c.JSON(http.StatusUnauthorized, gin.H{"error": "User not authenticated"})
-		return
-	}
-
 	// Get form data
 	title := c.PostForm("title")
 	if title == "" {
@@ -58,7 +51,7 @@ func UploadSheet(c *gin.Context) {
 	}
 
 	// Generate unique filename
-	filename := fmt.Sprintf("%d_%d%s", userID.(uint), time.Now().Unix(), filepath.Ext(header.Filename))
+	filename := fmt.Sprintf("%d%s", time.Now().Unix(), filepath.Ext(header.Filename))
 	filePath := filepath.Join(uploadDir, filename)
 
 	// Save file
@@ -123,17 +116,7 @@ func UploadSheet(c *gin.Context) {
 func ListSheets(c *gin.Context) {
 	var sheets []models.Sheet
 
-	query := database.DB.Preload("User")
-
-	// Filter by user if specified
-	if userIDStr := c.Query("user_id"); userIDStr != "" {
-		userID, err := strconv.ParseUint(userIDStr, 10, 32)
-		if err == nil {
-			query = query.Where("user_id = ?", uint(userID))
-		}
-	}
-
-	if err := query.Find(&sheets).Error; err != nil {
+	if err := database.DB.Find(&sheets).Error; err != nil {
 		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to fetch sheets"})
 		return
 	}
diff --git a/src/models/sheet.go b/src/models/sheet.go
index 55d907f..080db2d 100644
--- a/src/models/sheet.go
+++ b/src/models/sheet.go
@@ -15,7 +15,6 @@ type Sheet struct {
 	FilePath    string         `json:"file_path" gorm:"not null"`
 	FileSize    int64          `json:"file_size"`
 	FileHash    uint64         `json:"file_hash"`
-	User        User           `json:"user" gorm:"foreignKey:UserID"`
 	CreatedAt   time.Time      `json:"created_at"`
 	UpdatedAt   time.Time      `json:"updated_at"`
 	DeletedAt   gorm.DeletedAt `json:"-" gorm:"index"`