Bugfix/create activities of type fee, interest or liability (#6378)

* Fix creation of activities with type FEE, INTEREST or LIABILITY

* Update changelog

CHANGELOG.md

@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## Unreleased
+
+### Fixed
+
+- Fixed an issue when creating activities of type `FEE`, `INTEREST` or `LIABILITY`
+
 ## 2.242.0 - 2026-02-22
 
 ### Changed

apps/client/src/app/pages/portfolio/activities/create-or-update-activity-dialog/create-or-update-activity-dialog.component.ts

@@ -501,11 +501,12 @@ export class GfCreateOrUpdateActivityDialogComponent implements OnDestroy {
       comment: this.activityForm.get('comment').value || null,
       currency: this.activityForm.get('currency').value,
       customCurrency: this.activityForm.get('currencyOfUnitPrice').value,
+      dataSource: ['FEE', 'INTEREST', 'LIABILITY', 'VALUABLE'].includes(
+        this.activityForm.get('type').value
+      )
+        ? 'MANUAL'
+        : this.activityForm.get('dataSource').value,
       date: this.activityForm.get('date').value,
-      dataSource:
-        this.activityForm.get('type').value === 'VALUABLE'
-          ? 'MANUAL'
-          : this.activityForm.get('dataSource').value,
       fee: this.activityForm.get('fee').value,
       quantity: this.activityForm.get('quantity').value,
       symbol: