It includes ballots from about 120,000 voters who somehow were erased from the county's rolls.
According to the Los Angeles County Registrar-Recorder's Office, the issue stemmed from a printing error.
Important Election Day Information: If your name does not appear on the roster at your polling place today, do not be alarmed. You will be given a provisional ballot and your vote will count ⬇️ #LAVotes pic.twitter.com/Ad6TBGryIx— Los Angeles County (@CountyofLA) June 5, 2018
"This was an issue with the names being printed on the rosters of the polling places," L.A. County Registrar-Recorder/County Clerk Dean C. Logan said. "This is not an issue where there is any question about the validity or the eligibility of these voters."
If you cast a provisional ballot, you can check the status of it by visiting www.lavote.net/pbstatus.