Method changeId

frontend/src/services/uploadService.ts:303–313

(oldId: string, newId: string)

  }

  changeId(oldId: string, newId: string) {
    if (this.files.get(newId)) {
      return;
    }
    const file = this.files.get(oldId)!;
    this.files.set(newId, file);
    this.files.delete(oldId);
    if (this.current == oldId) {
      this.current = newId;
    }
  }

  update() {
    for (let i = 0; i < this.task.length; i++) {