diff --git a/Server/SQL/ConsumableItem.cs b/Server/SQL/ConsumableItem.cs
index c951d58..821e419 100644
--- a/Server/SQL/ConsumableItem.cs
+++ b/Server/SQL/ConsumableItem.cs
@@ -1,5 +1,6 @@
 using Microsoft.EntityFrameworkCore;
 using Newtonsoft.Json;
+using System.ComponentModel.DataAnnotations;
 using System.ComponentModel.DataAnnotations.Schema;
 
 namespace Server.SQL
@@ -7,6 +8,7 @@ namespace Server.SQL
     [Table("consumable_item", Schema = "gamedb")]
     public class ConsumableItem 
     {
+        [Key]
         public int id { get; set; }
         [JsonIgnore]
         public int user_id { get; set; }
diff --git a/Server/SQL/DeckInfo.cs b/Server/SQL/DeckInfo.cs
index 8d7f9ab..2c8c13b 100644
--- a/Server/SQL/DeckInfo.cs
+++ b/Server/SQL/DeckInfo.cs
@@ -1,5 +1,6 @@
 using Microsoft.EntityFrameworkCore;
 using Newtonsoft.Json;
+using System.ComponentModel.DataAnnotations;
 using System.ComponentModel.DataAnnotations.Schema;
 
 namespace Server.SQL
@@ -7,6 +8,7 @@ namespace Server.SQL
     [Table("deck_info", Schema = "gamedb")]
     public class DeckInfo
     {
+        [Key]
         public int id { get; set; }
         [JsonIgnore]
         public int user_id { get; set; }
diff --git a/Server/SQL/DeckUnitInfo.cs b/Server/SQL/DeckUnitInfo.cs
index fd7d795..54afffe 100644
--- a/Server/SQL/DeckUnitInfo.cs
+++ b/Server/SQL/DeckUnitInfo.cs
@@ -1,5 +1,6 @@
 using Microsoft.EntityFrameworkCore;
 using Newtonsoft.Json;
+using System.ComponentModel.DataAnnotations;
 using System.ComponentModel.DataAnnotations.Schema;
 
 namespace Server.SQL
@@ -7,6 +8,7 @@ namespace Server.SQL
     [Table("deck_unit_info", Schema = "gamedb")]
     public class DeckUnitInfo
     {
+        [Key]
         public int id { get; set; }
         [JsonIgnore]
         public int user_id { get; set; }
diff --git a/Server/SQL/Equipment.cs b/Server/SQL/Equipment.cs
index 11efc59..51a3ace 100644
--- a/Server/SQL/Equipment.cs
+++ b/Server/SQL/Equipment.cs
@@ -1,5 +1,6 @@
 using Microsoft.EntityFrameworkCore;
 using Newtonsoft.Json;
+using System.ComponentModel.DataAnnotations;
 using System.ComponentModel.DataAnnotations.Schema;
 
 namespace Server.SQL
@@ -7,6 +8,7 @@ namespace Server.SQL
     [Table("equipment", Schema = "gamedb")]
     public class Equipment
     {
+        [Key]
         public int id { get; set; }
         [JsonIgnore]
         public int user_id { get; set; }
diff --git a/Server/SQL/EtcItem.cs b/Server/SQL/EtcItem.cs
index 0a31c60..7c6e98e 100644
--- a/Server/SQL/EtcItem.cs
+++ b/Server/SQL/EtcItem.cs
@@ -1,5 +1,6 @@
 using Microsoft.EntityFrameworkCore;
 using Newtonsoft.Json;
+using System.ComponentModel.DataAnnotations;
 using System.ComponentModel.DataAnnotations.Schema;
 
 namespace Server.SQL
@@ -7,6 +8,7 @@ namespace Server.SQL
     [Table("etc_item", Schema = "gamedb")]
     public class EtcItem
     {
+        [Key]
         public int id { get; set; }
         [JsonIgnore]
         public int user_id { get; set; }
diff --git a/Server/SQL/ResetShopItem.cs b/Server/SQL/ResetShopItem.cs
index 5c75932..d32c257 100644
--- a/Server/SQL/ResetShopItem.cs
+++ b/Server/SQL/ResetShopItem.cs
@@ -1,6 +1,7 @@
 using Microsoft.EntityFrameworkCore;
 using Newtonsoft.Json;
 using Server.SQL.Excel;
+using System.ComponentModel.DataAnnotations;
 using System.ComponentModel.DataAnnotations.Schema;
 
 namespace Server.SQL
@@ -8,6 +9,7 @@ namespace Server.SQL
     [Table("reset_shop_item", Schema = "gamedb")]
     public class ResetShopItem
     {
+        [Key]
         public int id { get; set; }
         [JsonIgnore]
         public int user_id { get; set; }
diff --git a/Server/SQL/ShopItem.cs b/Server/SQL/ShopItem.cs
index 8dff4c3..3557070 100644
--- a/Server/SQL/ShopItem.cs
+++ b/Server/SQL/ShopItem.cs
@@ -1,5 +1,6 @@
 using Microsoft.EntityFrameworkCore;
 using Newtonsoft.Json;
+using System.ComponentModel.DataAnnotations;
 using System.ComponentModel.DataAnnotations.Schema;
 
 namespace Server.SQL
@@ -7,6 +8,7 @@ namespace Server.SQL
     [Table("shop_item", Schema = "gamedb")]
     public class ShopItem
     {
+        [Key]
         public int id { get; set; }
         [JsonIgnore]
         public int user_id { get; set; } 
diff --git a/Server/SQL/StoryProgress.cs b/Server/SQL/StoryProgress.cs
index 1abd0ce..a39bef3 100644
--- a/Server/SQL/StoryProgress.cs
+++ b/Server/SQL/StoryProgress.cs
@@ -1,5 +1,6 @@
 using Microsoft.EntityFrameworkCore;
 using Newtonsoft.Json;
+using System.ComponentModel.DataAnnotations;
 using System.ComponentModel.DataAnnotations.Schema;
 
 namespace Server.SQL
@@ -7,6 +8,7 @@ namespace Server.SQL
     [Table("story_progress", Schema = "gamedb")]
     public class StoryProgress
     {
+        [Key]
         public int id { get; set; }
         [JsonIgnore]
         public int user_id { get; set; }
diff --git a/Server/SQL/User.cs b/Server/SQL/User.cs
index 8cacb51..c822a2e 100644
--- a/Server/SQL/User.cs
+++ b/Server/SQL/User.cs
@@ -1,5 +1,6 @@
 using Microsoft.EntityFrameworkCore;
 using Newtonsoft.Json;
+using System.ComponentModel.DataAnnotations;
 using System.ComponentModel.DataAnnotations.Schema;
 
 namespace Server.SQL
@@ -7,7 +8,7 @@ namespace Server.SQL
     [Table("user", Schema = "gamedb")]
     public class User
     {
-        [JsonIgnore]
+        [JsonIgnore] [Key]
         public int id { get; set; }
         public string uuid { get; set; }
         [JsonIgnore]