Changes in approved I129 in the proposed duties section

Is it is possible to correct things in the proposed duties section of approved i129. My employer made a mistake while submitting the petition and i just got the approved i129 form and saw the mistake.

Thanks in advance.

If the difference is trivial, then you can leave it as is. If you already have H-1 approved, and the job duties are changing for more than 50% then a new LCA and H-1 amendment is required.