(8)Climate change related risks are long-term in nature, non-linear and systemic, making them challenging for insurance and reinsurance undertakings to estimate solely based on past data. Directive (EU) 2025/2 introduced new requirements on the management of climate change related risks and sustainability risks more generally. In particular, Article 45a of Directive 2009/138/EC as amended by Directive (EU) 2025/2 requires undertakings to identify any material exposure to climate change risks and, where relevant, to assess the impact of long-term climate change scenarios on their business. However, when it comes to the valuation or computation of capital requirements with an internal model, insurance and reinsurance undertaking often use data from past events to inform predictions on risks materialising in the future. Data from past events may not sufficiently capture climate change related trends. Forward looking assessments, including plausible climate scenarios, may therefore be necessary to assess how the risks evolve and to mitigate possible impacts. Where an insurance or reinsurance undertaking relies too heavily on past data, its best estimate for obligations to policy holders or its internal model, where applied, may underestimate obligations or relevant risks. It is therefore necessary to require undertakings to have in place internal procedures to avoid overreliance on data from past events in relation to climate-change related trends.