Worked on enhancing data analysis reliability within the SBNSoftware/sbndcode repository, focusing on a critical bug fix in the PTBAnalysis module. Addressed an issue with incorrect indexing of the _ptb_llt_timestamp array, ensuring that Long-Term Timestamps (LLTs) are now accurately assigned in PTBAna. This correction preserves data integrity and supports more reliable downstream analytics. Applied C++ and data analysis skills to maintain traceability and accuracy in the codebase, emphasizing careful debugging and targeted improvements rather than new feature development. The work demonstrates a methodical approach to software maintenance, prioritizing robust data handling and long-term reliability in scientific analysis workflows.