diff --git a/src/routes/api/tenants/[id]/agents/[agentId]/absences/[absenceId]/+server.ts b/src/routes/api/tenants/[id]/agents/[agentId]/absences/[absenceId]/+server.ts
index 0b4ec94..9a230a9 100644
--- a/src/routes/api/tenants/[id]/agents/[agentId]/absences/[absenceId]/+server.ts
+++ b/src/routes/api/tenants/[id]/agents/[agentId]/absences/[absenceId]/+server.ts
@@ -340,7 +340,7 @@ export const GET: RequestHandler = async ({ params, locals }) => {
 
     // Check if user is authenticated
     if (!tenantId || !agentId || !absenceId) {
-      return new ValidationError("Missing tenant, agent, or absence ID").toJson();
+      throw new ValidationError("Missing tenant, agent, or absence ID");
     }
 
     checkPermission(locals, tenantId);