This article explains how to clear the download manager for a Lenovo Tab.
1. Go to Settings
2. Click on Apps & Notifications
3. Click on on See all apps
4. Click on the three dots at the top right-hand corner
5. Click on Show system
6. Scroll down until you find Download Manager, click on it.
7. Click on storage
8. Click on Clear Data
Well done, you have now cleared your download manager!