diff --git a/src/repositories/UnoptimizedInMemoryRepository.ts b/src/repositories/UnoptimizedInMemoryRepository.ts
index 60a8773..e992531 100644
--- a/src/repositories/UnoptimizedInMemoryRepository.ts
+++ b/src/repositories/UnoptimizedInMemoryRepository.ts
@@ -1,6 +1,6 @@
 import { GetterSetterRepository } from "./GetterSetterRepository";
 import {
-  IEntityWithIdAndOptionalTimestamp,
+  IEntityWithId,
   IEta,
   IOrderedStop,
   IRoute,
@@ -82,7 +82,7 @@ export class UnoptimizedInMemoryRepository implements GetterSetterRepository {
     return this.orderedStops.filter((value) => value.routeId === routeId);
   }
 
-  private findEntityById<T extends IEntityWithIdAndOptionalTimestamp>(entityId: string, arrayToSearchIn: T[]) {
+  private findEntityById<T extends IEntityWithId>(entityId: string, arrayToSearchIn: T[]) {
     return this.findEntityByMatcher((value) => value.id === entityId, arrayToSearchIn);
   }