AWS Certified SysOps Administrator - Associate SOA-C02 — Question 450

A company uses AWS CloudFormation to deploy its infrastructure. The company recently retired an application. A cloud operations engineer initiates CloudFormation stack deletion, and the stack gets stuck in DELETE_FAILED status. A SysOps administrator discovers that the stack had deployed a security group. The security group is referenced by other security groups in the environment. The SysOps administrator needs to delete the stack without affecting other applications. Which solution will meet these requirements in the MOST operationally efficient manner?