diff --git a/server/src/main/java/com/yogit/server/board/entity/Board.java b/server/src/main/java/com/yogit/server/board/entity/Board.java
index 927510e..df5385a 100644
--- a/server/src/main/java/com/yogit/server/board/entity/Board.java
+++ b/server/src/main/java/com/yogit/server/board/entity/Board.java
@@ -10,6 +10,7 @@
 
 import javax.persistence.*;
 import java.time.LocalDateTime;
+import java.util.ArrayList;
 import java.util.List;
 
 @Entity
@@ -17,7 +18,7 @@
 @NoArgsConstructor(access = AccessLevel.PROTECTED)
 public class Board {
     @Id
-    @GeneratedValue(strategy = GenerationType.AUTO)
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
     @Column(name = "board_id")
     private Long id;
 
@@ -49,8 +50,8 @@ public class Board {
 
     private int totalMember;
 
-    @OneToMany(mappedBy = "board")
-    private List<BoardUser> boardUsers;
+    @OneToMany(mappedBy = "board", cascade = CascadeType.ALL) // 보드 생성 순간 보드 유저 리스트 생성
+    private List<BoardUser> boardUsers = new ArrayList<>();
 
     @OneToMany(mappedBy = "board")
     private List<BoardImage> boardImages;
diff --git a/server/src/main/java/com/yogit/server/board/entity/BoardImage.java b/server/src/main/java/com/yogit/server/board/entity/BoardImage.java
index 58299b3..559c04a 100644
--- a/server/src/main/java/com/yogit/server/board/entity/BoardImage.java
+++ b/server/src/main/java/com/yogit/server/board/entity/BoardImage.java
@@ -11,7 +11,7 @@
 @NoArgsConstructor(access = AccessLevel.PROTECTED)
 public class BoardImage {
     @Id
-    @GeneratedValue(strategy = GenerationType.AUTO)
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
     @Column(name = "board_image_id")
     private Long id;
 
diff --git a/server/src/main/java/com/yogit/server/board/entity/BoardUser.java b/server/src/main/java/com/yogit/server/board/entity/BoardUser.java
index f460fc2..6d00bfa 100644
--- a/server/src/main/java/com/yogit/server/board/entity/BoardUser.java
+++ b/server/src/main/java/com/yogit/server/board/entity/BoardUser.java
@@ -12,7 +12,7 @@
 @NoArgsConstructor(access = AccessLevel.PROTECTED)
 public class BoardUser {
     @Id
-    @GeneratedValue(strategy = GenerationType.AUTO)
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
     @Column(name = "board_user_id")
     private Long id;
 
@@ -31,6 +31,6 @@ public class BoardUser {
     public BoardUser(User user, Board board) {
         this.user = user;
         this.board = board;
-        board.addBoardUser(this);
+//        board.addBoardUser(this);
     }
 }
diff --git a/server/src/main/java/com/yogit/server/board/entity/BookMark.java b/server/src/main/java/com/yogit/server/board/entity/BookMark.java
index 56665ab..1f668fb 100644
--- a/server/src/main/java/com/yogit/server/board/entity/BookMark.java
+++ b/server/src/main/java/com/yogit/server/board/entity/BookMark.java
@@ -12,7 +12,7 @@
 @NoArgsConstructor(access = AccessLevel.PROTECTED)
 public class BookMark {
     @Id
-    @GeneratedValue(strategy = GenerationType.AUTO)
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
     @Column(name = "book_mark_id")
     private Long id;
 
diff --git a/server/src/main/java/com/yogit/server/board/entity/Category.java b/server/src/main/java/com/yogit/server/board/entity/Category.java
index 5f4a907..6ae09b7 100644
--- a/server/src/main/java/com/yogit/server/board/entity/Category.java
+++ b/server/src/main/java/com/yogit/server/board/entity/Category.java
@@ -11,7 +11,7 @@
 @NoArgsConstructor(access = AccessLevel.PROTECTED)
 public class Category {
     @Id
-    @GeneratedValue(strategy = GenerationType.AUTO)
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
     @Column(name = "category_id")
     private Long id;
 
diff --git a/server/src/main/java/com/yogit/server/board/entity/ClipBoard.java b/server/src/main/java/com/yogit/server/board/entity/ClipBoard.java
index 43d6af9..7a5804c 100644
--- a/server/src/main/java/com/yogit/server/board/entity/ClipBoard.java
+++ b/server/src/main/java/com/yogit/server/board/entity/ClipBoard.java
@@ -13,7 +13,7 @@
 @NoArgsConstructor(access = AccessLevel.PROTECTED)
 public class ClipBoard {
     @Id
-    @GeneratedValue(strategy = GenerationType.AUTO)
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
     @Column(name = "clip_board_id")
     private Long id;
 
diff --git a/server/src/main/java/com/yogit/server/board/entity/Comment.java b/server/src/main/java/com/yogit/server/board/entity/Comment.java
index 438fcee..9d21fd0 100644
--- a/server/src/main/java/com/yogit/server/board/entity/Comment.java
+++ b/server/src/main/java/com/yogit/server/board/entity/Comment.java
@@ -12,7 +12,7 @@
 @NoArgsConstructor(access = AccessLevel.PROTECTED)
 public class Comment {
     @Id
-    @GeneratedValue(strategy = GenerationType.AUTO)
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
     @Column(name = "comment_id")
     private Long id;
 
diff --git a/server/src/main/java/com/yogit/server/board/service/BoardServiceImpl.java b/server/src/main/java/com/yogit/server/board/service/BoardServiceImpl.java
index 0df86a7..7f86229 100644
--- a/server/src/main/java/com/yogit/server/board/service/BoardServiceImpl.java
+++ b/server/src/main/java/com/yogit/server/board/service/BoardServiceImpl.java
@@ -48,7 +48,7 @@ public ApplicationResponse<BoardRes> createBoard(CreateBoardReq dto){
         board.changeBoardCurrentMember(0);// currentMember 디폴트=0
 
         // 호스트 boardUser 생성 및 board에 추가
-//        board.addBoardUser(new BoardUser(host, board));
+        board.addBoardUser(new BoardUser(host, board));
 
         // board 저장
         Board savedBoard = boardRepository.save(board);
diff --git a/server/src/main/java/com/yogit/server/user/entity/City.java b/server/src/main/java/com/yogit/server/user/entity/City.java
index 3d6e639..9bd1392 100644
--- a/server/src/main/java/com/yogit/server/user/entity/City.java
+++ b/server/src/main/java/com/yogit/server/user/entity/City.java
@@ -15,7 +15,7 @@
 @NoArgsConstructor(access = AccessLevel.PROTECTED)
 public class City {
     @Id
-    @GeneratedValue(strategy = GenerationType.AUTO)
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
     @Column(name = "city_id")
     private Long id;
 
diff --git a/server/src/main/java/com/yogit/server/user/entity/CountryCode.java b/server/src/main/java/com/yogit/server/user/entity/CountryCode.java
index 22841b7..8bcc6e5 100644
--- a/server/src/main/java/com/yogit/server/user/entity/CountryCode.java
+++ b/server/src/main/java/com/yogit/server/user/entity/CountryCode.java
@@ -11,7 +11,7 @@
 @NoArgsConstructor(access = AccessLevel.PROTECTED)
 public class CountryCode {
     @Id
-    @GeneratedValue(strategy = GenerationType.AUTO)
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
     @Column(name = "country_code_id")
     private Long id;
 
diff --git a/server/src/main/java/com/yogit/server/user/entity/Interest.java b/server/src/main/java/com/yogit/server/user/entity/Interest.java
index d4d87bb..d26de6f 100644
--- a/server/src/main/java/com/yogit/server/user/entity/Interest.java
+++ b/server/src/main/java/com/yogit/server/user/entity/Interest.java
@@ -13,7 +13,7 @@
 @NoArgsConstructor(access = AccessLevel.PROTECTED)
 public class Interest {
     @Id
-    @GeneratedValue(strategy = GenerationType.AUTO)
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
     @Column(name = "interest_id")
     private Long id;
 
diff --git a/server/src/main/java/com/yogit/server/user/entity/Language.java b/server/src/main/java/com/yogit/server/user/entity/Language.java
index 181f898..76a0b43 100644
--- a/server/src/main/java/com/yogit/server/user/entity/Language.java
+++ b/server/src/main/java/com/yogit/server/user/entity/Language.java
@@ -9,7 +9,7 @@
 @NoArgsConstructor(access = AccessLevel.PROTECTED)
 public class Language {
     @Id
-    @GeneratedValue(strategy = GenerationType.AUTO)
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
     @Column(name = "language_id")
     private Long id;
 
diff --git a/server/src/main/java/com/yogit/server/user/entity/User.java b/server/src/main/java/com/yogit/server/user/entity/User.java
index ff77823..75308bd 100644
--- a/server/src/main/java/com/yogit/server/user/entity/User.java
+++ b/server/src/main/java/com/yogit/server/user/entity/User.java
@@ -15,7 +15,7 @@
 public class User {
 
     @Id
-    @GeneratedValue(strategy = GenerationType.AUTO)
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
     @Column(name = "user_id")
     private Long id;
 
diff --git a/server/src/main/java/com/yogit/server/user/entity/UserImage.java b/server/src/main/java/com/yogit/server/user/entity/UserImage.java
index 76341ca..a3a43f9 100644
--- a/server/src/main/java/com/yogit/server/user/entity/UserImage.java
+++ b/server/src/main/java/com/yogit/server/user/entity/UserImage.java
@@ -11,7 +11,7 @@
 @NoArgsConstructor(access = AccessLevel.PROTECTED)
 public class UserImage {
     @Id
-    @GeneratedValue(strategy = GenerationType.AUTO)
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
     @Column(name = "user_image_id")
     private Long id;
 
diff --git a/server/src/main/java/com/yogit/server/user/entity/UserInterest.java b/server/src/main/java/com/yogit/server/user/entity/UserInterest.java
index 1ffeede..0ca5cdb 100644
--- a/server/src/main/java/com/yogit/server/user/entity/UserInterest.java
+++ b/server/src/main/java/com/yogit/server/user/entity/UserInterest.java
@@ -11,7 +11,7 @@
 @NoArgsConstructor(access = AccessLevel.PROTECTED)
 public class UserInterest {
     @Id
-    @GeneratedValue(strategy = GenerationType.AUTO)
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
     @Column(name = "user_interest_id")
     private Long id;