`authselect check` or `authselect apply-changes` command throws "[error] Unexpected changes to the configuration were detected"

Issue

• When manual changes are performed on /etc/pam.d/password-auth or /etc/pam.d/system-auth, authselect apply-changes gives below errors.

#authselect apply-changes
[error] [/etc/authselect/system-auth] has unexpected content!
[error] [/etc/authselect/password-auth] has unexpected content!
[error] Unexpected changes to the configuration were detected.
[error] Refusing to activate profile unless those changes are removed or overwrite is requested.
Some unexpected changes to the configuration were detected. Use 'select' command instead.