describes something or someone that is likely to make mistakes or be susceptible to errors
The complex coding task proved to be error-prone, requiring careful debugging and testing.
The manual data entry process was error-prone, leading to inaccuracies in the final report.
New employees often find the outdated software to be error-prone, resulting in frequent mistakes.
The automated system was designed to reduce the likelihood of human error, but it still proved to be error-prone in certain situations.