This is in response to an inquiry posed by a participant known as @recent798. The central focus of @recent798's question relates to the latter segment of a previously shared comment. This segment underscores the consideration for implementing a new rule. This proposed rule aims at retroactively mitigating the occurrence of duplicate coinbase transactions pertaining to two historical events, identified by their unique markers as 209,921 and 490,897. The suggestion implies a preventive measure to ensure such duplications are avoided in the future, reflecting on past instances to guide corrective actions.