Topic: If there "was" a source, how can I do for source_request tag?

Little complex problem maybe only for me

I found that tag when I see meruka-kun posts.
Especially this post
post #197107

SauceNAO shows that there is source at pixiv, id is 25387491.
However, Artist delete that pixiv post. So, there is no source now.

From howto:source, It said do not use incorrect(=not working for now) source.

So, result is "there is no such as source" because pixiv link was "only link" for that

In this situation, Is "source_request" tag really needed?
Is it okay delete that tag?

Updated by Mairo