diff --git a/backend/src/main/java/com/example/todoapp/model/Stocks.java b/backend/src/main/java/com/example/todoapp/model/Stocks.java
index 921313f..d297ab9 100644
--- a/backend/src/main/java/com/example/todoapp/model/Stocks.java
+++ b/backend/src/main/java/com/example/todoapp/model/Stocks.java
@@ -62,7 +62,7 @@ public class Stocks {
      @ManyToOne(fetch = FetchType.LAZY)
      @JoinColumn(
          name = "user_id",
-         referencedColumnName = "user_id",
+         referencedColumnName = "id",
          nullable = false
      )
     private User user_id;
@@ -94,7 +94,7 @@ public class Stocks {
     /**
      * 賞味期限
      */
-    @Column(nullable = false)
+    @Column(nullable = true)
     private LocalDate exp_date;
 
 }
\ No newline at end of file
diff --git a/backend/src/main/java/com/example/todoapp/model/ToBuys.java b/backend/src/main/java/com/example/todoapp/model/ToBuys.java
index ddddfe0..441e821 100644
--- a/backend/src/main/java/com/example/todoapp/model/ToBuys.java
+++ b/backend/src/main/java/com/example/todoapp/model/ToBuys.java
@@ -58,7 +58,7 @@ public class ToBuys {
      @ManyToOne(fetch = FetchType.LAZY)
      @JoinColumn(
          name = "user_id",
-         referencedColumnName = "user_id",
+         referencedColumnName = "id",
          nullable = false
      )
     private User user_id;
@@ -73,9 +73,8 @@ public class ToBuys {
      /**
      * 購入するお店
      */
-    @NotBlank
     @Column(nullable = true)
-    private String store;
+    private String shop;
 
 }