Misstep in Confidentiality: A CFA Ethical Dilemma

As a chartered financial analyst working for an investment firm, you have been tasked with evaluating a new investment strategy for one of your firm's high-net-worth clients. In the process, you come across proprietary information regarding this investment strategy that your firm has been developing for years. During a casual conversation at a social event, you unknowingly mention some details of this proprietary strategy to a colleague who works for a rival firm. After realizing your mistake, you feel concerned about the potential breach of confidentiality. According to the CFA Institute Code of Ethics and Standards of Professional Conduct, what should you do in this situation?