You might get this error when downloading an app you already downloaded with another account on the same phone

The best way to resolve this is to remove the Google account(s) and adding the proper account back.

Follow these steps to remove the account:

  1. Go to Settings.
  2. Tap cloud and accounts.
  3. Tap accounts.
  4. Select the Google account (if your multiple accounts, pick the one you’re using for Google Play Store).
  5. Tap REMOVE ACCOUNT.
  6. Tap REMOVE ACCOUNT to confirm.

And follow these steps to add your Google account again:

  1. Go to Settings.
  2. Tap cloud and accounts.
  3. Tap accounts.
  4. Tap Add account at the bottom.
  5. Select Google.
  6. Provide the screen unlock if prompted
  7. Enter your Google account credentials.