good question! out of curiosity, if you find one of the webmentions on your bridgy page - click "Older →" a few times if necessary - and then click its retry button, does that fix the link?

otherwise, this is CMS/web server specific, so your best bet is to ask in #indieweb-wordpress or on https://github.com/pfefferle/wordpress-webmention or https://github.com/pfefferle/wordpress-semantic-linkbacks . 🤞

At a guess it’s about 1000 web mentions down the list. Is there an easier way to find it that clicking “older”?

sadly no.

at a high level, updating old webmentions when something changes like this is a good use case, but not something Bridgy currently supports, largely due to scale. it's sent over 1.6M webmentions already, so watching them all and detecting changes that might affect any of them is a much bigger challenge than i plan to tackle, especially since i don't currently guarantee that Bridgy even stores all of those sent webmentions. I'm open to design proposals and PRs though!

in the meantime, you're right, you could definitely update these links manually yourself! @dshanske et al can hopefully help there.

Editing the links manually can be done... I referred because I thought there might be something to track this at the Bridgy level.

The links should be editable ob the comment edit fields, which field is greyed out?

thanks @billbennettnz! good idea.

I'll keep this issue open here to track the larger idea of tracking all sent webmentions and resending when they change.

I'm also surprised that retrying didn't work. could you post the bridgy webmention source URL? or a link to your user page with the right ?responses_before=... param? I'm vacationing without a computer right now, but I'd like to look when I'm back.

Hm, assuming you are (at least temporarily - like for a couple of months) storing webmentions in a database … a form to search it would be handy.
Above, we've seen the filter for datetime.

I'd assume, @billbennettnz would have the link to the webmention he was asked to update, so being able to search for that one, would help here as well.

What other fields could be generally of interest?

@Ryuno-Ki yes! agreed. luckily, bridgy already supports that! you can plug a silo or original post URL into the Resend for post text box on your user page, and it will resend all the webmentions it knows about.

this issue is more involved though. it's about updating replies (etc) from people who have changed their username. that's complicated for a handful of reasons beyond just finding and resending past webmentions. (fortunately, username changes are relatively rare!)

Related: #137

For the record, Bridgy does currently detect and resend recent webmentions when they change. For example, if someone comments on a GitHub issue, and then edits their comment, Bridgy would notice the change and resend the comment.

("Recent" here isn't based on time as much as post velocity. Bridgy will generally see changes to responses on the last 10-50 or so of the user's posts.)