At least 3 plugins find PuTTY Session Manager version 0.50.189.0 and then trigger vulnerabilities that are not related to PuTTY Session Manager, but to PuTTY instead. Three of these are listed below, but there are likely to be more.
2013/gb_putty_mult_int_overflow_vuln_win.nasl
2019/putty/gb_putty_scp_mult_spoofing_vuln_win.nasl
pre2008/putty_logon_credential_leak.nasl