Bugfix/race condition in upsert of account balance (#8306)

* Fix race condition in upsert of account balance

* Update changelog

CHANGELOG.md

@@ -15,6 +15,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 
+- Fixed a race condition in the creation of an account balance
 - Fixed the handling of an output of the model which does not agree with the schema in the import of activities with _Ghostfolio AI_ (experimental)
 
 ## 3.92.0 - 2026-10-24

apps/api/src/app/account-balance/account-balance.service.ts

@@ -51,17 +51,13 @@ export class AccountBalanceService {
   }: CreateAccountBalanceDto & {
     userId: string;
   }): Promise<AccountBalance> {
+    const dateOfBalance = resetHours(parseISO(date));
+
     const accountBalance = await this.prismaService.accountBalance.upsert({
       create: {
-        account: {
+        accountId,
-          connect: {
-            id_userId: {
         userId,
-              id: accountId
+        date: dateOfBalance,
-            }
-          }
-        },
-        date: resetHours(parseISO(date)),
         value: balance
       },
       update: {
@@ -71,7 +67,7 @@ export class AccountBalanceService {
         accountId_userId_date: {
           accountId,
           userId,
-          date: resetHours(parseISO(date))
+          date: dateOfBalance
         }
       }
     });