During July 2025, Matteo Morgante focused on stabilizing Monte Carlo data handling in the AliceO2Group/O2Physics repository to improve simulation reliability. He addressed a critical bug that caused crashes when McCollision data was missing by introducing defensive programming techniques in C++. Matteo refactored the MC processing function signature, adding input validation to ensure robust handling of absent collision information. This work reduced the crash surface and enhanced maintainability of the codebase, directly improving the stability of MC data pipelines. His contributions in data analysis and physics simulation enabled more reliable workflows, minimizing runtime interruptions and supporting faster issue resolution for the team.