When running the install the log reports:
09:59:24 | uninstall_agent | SEVERE | uninstall agent tool version 15.8.00000.19012 cannot uninstall agent version 15.8.00100.01075 2022-11-10 09:59:24
Release : 15.8
Agent uninstaller is older than the version of the installed agent
Update the uninstall utility to match the version of the agent installed. See this KB for details on downloading agent files.