Thanks to a recent comment in CRUDE, a duplicate question from a new user was found and deleted. However, I can't cast a deletion vote on its duplicate target, which has been closed and inactive for about a month, and has a negative score with no answers.
I know that in a duplicate target can't be deleted unless the duplicate is reopened or deleted. The later option has already been done, so why can't I vote to delete the former duplicate target?
(Edited in response to a comment)
The situation in the linked duplicate is different:
\begin{array}{c|c|c} & \text{linked question} & \text{this question} \\ \hline \text{duplicate target} & \text{deleted} & \text{not deleted} \\ \hline \text{duplicate} & \text{not deleted} & \text{deleted} \end{array}
I'm asking for clarification for the accepted answer in the linked question because at the moment I wrote this question, the solution in that answer failed to be applied to this situation.