Twitter experienced a major outage caused by an employee who accidentally deleted data.
The team responsible for the internal service was no longer at the company following Elon Musk's cost-cutting measures and ultimatum to staff in November.
Twitter employee numbers have decreased more than two-thirds under Musk's leadership.
The outage prompted Elon Musk to email staff to pause new feature development and prioritize system stability. The outage also drew criticism from Twitter co-founder Jack Dorsey.