if i delete whatsapp app and download it again

Restart your device and add your account again.

Tap the Menu icon on the top right corner of the screen. If you're using a Google account, tap Google and then the account. Under Accounts, tap the name of the account that you want to remove. If clearing the cache and data doesn't resolve the issue, remove your Google account, restart your device, and then add your Google account again. Remove your Google account and then add it again When the cache and data are cleared, the Google Play Store error should be resolved.

If cleaning the cache of the Google Play Store and Google Play Services doesn't resolve the issue, try clearing the Google Play Store data: Repeat the steps above, but replace Google Play Store in step 3 with Google Play services. Open the app details and tap the Force stop button. Scroll to All apps and then scroll down to the Google Play Store app. (This option might differ depending on your device.) Try the following workarounds to fix the Google Play Store errors. The following are some of the most common Google Play Store errors: These errors might be due to Google Play Store updates, Google cache issues, Google Play Store stored data issues, or Google account issues. Google Play Store Errors typically contain random numbers and are generated when you try to download apps from the Google Play Store. In the meantime, please see below for more information and try the workarounds suggested. The Google Play team is aware of this problem and is working to resolve the issues. You might receive an error that contains random numbers when you download Office apps from the Google Play store. Resolve app installation errors in Google Play Store

If i delete whatsapp app and download it again