It's understandable that you're concerned about this error. However, the primary purpose of background verification is to validate the authenticity of the information provided by the candidate. If you have attached the correct documents, including those approved by DigiLocker, it should help in validating your class 10 details.
That being said, it's always better to rectify any errors as soon as they're identified. Here's what you can do:
1. Contact the HR department: Reach out to them at the earliest, explain the mistake, and ask if it's possible to correct the information. They might allow you to update the form or note the correct information.
2. Provide Correct Documents: Ensure that you have provided all the necessary documents that correctly reflect your class 10 board details. This will help in the verification process.
3. Be Transparent: If there's an interview or discussion, be upfront about the mistake. This transparency will be appreciated and it will also reduce the chances of your application being rejected due to the error.
Remember, errors happen and most HR departments understand this. As long as you're proactive in addressing the issue and have the correct documentation, this should not lead to your application being rejected.