Twitter Inc., after laying off roughly half the company on Friday following Elon Musk’s $44 billion acquisition, is now reaching out to dozens of employees who lost their jobs and asking them to return.

Some of those who are being asked to return were laid off by mistake, according to two people familiar with the moves. Others were let go before management realized that their work and experience may be necessary to build the new features Musk envisions, the people said, asking not to be identified discussing private information.