diff --git a/database/migration/deploy/new_way_delete_esp_permission.sql b/database/migration/deploy/new_way_delete_esp_permission.sql
index 5081168..a42d445 100644
--- a/database/migration/deploy/new_way_delete_esp_permission.sql
+++ b/database/migration/deploy/new_way_delete_esp_permission.sql
@@ -6,25 +6,25 @@ BEGIN;
 
 
 -- Remove permission to DELETE on data and esp tables
-REVOKE DELETE ON api.data FROM web_user;
-REVOKE DELETE ON api.esp FROM web_user;
+REVOKE DELETE ON api.data FROM web_user;    -- Revoke permission for the user to DELETE datas on table DATA
+REVOKE DELETE ON api.esp FROM web_user;     -- Revoke permission for the user to DELETE datas on table ESP
 
 -- Add permission to DELETE on data and esp tables
-GRANT DELETE ON api.data TO web_user;
-GRANT DELETE ON api.esp TO web_user;
+GRANT DELETE ON api.data TO web_user;       -- Add permission for the user to DELETE datas on table DATA
+GRANT DELETE ON api.esp TO web_user;        -- Add permission for the user to DELETE datas on table ESP
 
 -- Delete the function if exists
-DROP FUNCTION IF EXISTS api.delete_esp_data_and_esp();
+-- DROP FUNCTION IF EXISTS api.delete_esp_data_and_esp();
 
 -- Create the function
-CREATE FUNCTION api.delete_esp_data_and_esp()
+CREATE FUNCTION api.delete_esp_data_and_esp(id INT)
     RETURNS VOID AS $$
 
 BEGIN
 
     -- DELETE on data and esp tables
-    DELETE FROM api.data WHERE esp_id = ${id};
-    DELETE FROM api.esp WHERE id = ${id};
+    DELETE FROM api.data WHERE esp_id = id;
+    DELETE FROM api.esp WHERE id = id;
 
 END;
 $$ LANGUAGE plpgsql;
diff --git a/database/migration/revert/add_new_permission.sql b/database/migration/revert/add_new_permission.sql
index 4ea61be..fad3771 100644
--- a/database/migration/revert/add_new_permission.sql
+++ b/database/migration/revert/add_new_permission.sql
@@ -2,6 +2,6 @@
 
 BEGIN;
 
-        revoke update on api.users to web_user; -- any user can edit users
+        revoke update on api.users from web_user; -- any user can edit users
 
 COMMIT;
diff --git a/nextjs-interface/src/app/ui/dashboard/DeleteEsp.tsx b/nextjs-interface/src/app/ui/dashboard/DeleteEsp.tsx
index 4579b6f..f3fada7 100644
--- a/nextjs-interface/src/app/ui/dashboard/DeleteEsp.tsx
+++ b/nextjs-interface/src/app/ui/dashboard/DeleteEsp.tsx
@@ -10,7 +10,6 @@ export default function DeleteEsp({ id }: { id: string }) {
     try {
       const response = await fetch(url, {
         headers: {
-          "Content-Type": "application/json",
           Authorization: `Bearer ${getToken()}`,
         },
       });
@@ -33,4 +32,4 @@ export default function DeleteEsp({ id }: { id: string }) {
       <Trash2 onClick={() => deleteEsp(id)} />
     </div>
   );
-}
+}
\ No newline at end of file