You might still have to rerun migrateActors.php after making that change,
as otherwise some of the older edits attributed to Anonymous may have
disappeared.

--
Brian

On Wed, Jan 8, 2020 at 6:56 AM Valerio Pelliccioni <[email protected]> wrote:

> Thank you so much Brian.
> Your first suggestion solved the problem.
> It was enough to add the following line in LocalSettings.php
>
> // Add just one user name to the default array
> $wgReservedUsernames[] = 'Anonymous';
>
> to get this:
>
> Merge from Giada (691) to Anonymous (0) is complete.
> Giada (691) has been deleted.
>
>
> ---------
> Valerio Pelliccioni
> W: https://tunearch.org/wiki/User:Valerio_Pelliccioni
>
>
> On 07/01/2020, 20:47, "MediaWiki-l on behalf of Brian Wolff" <
> [email protected] on behalf of [email protected]>
> wrote:
>
>     Such users can still exist, they can't just be a valid name. Adding it
> to
>     $wgReservedUsernames might be enough to allow it as an anon (not
> sure). At
>     the very least, having something like  '<Anonymous>' would be fine,
> since <
>     isn't allowed in real usernames.
>
>     --
>     Brian
>
>     On Tue, Jan 7, 2020 at 7:39 PM Valerio Pelliccioni <[email protected]>
> wrote:
>
>     > Thanks Brian.
>     > I run the suggested scripts but didn't solve the problem.
>     > I need a user "Anonymous".
>     >
>     > >> Usernames that are valid usernames are no longer allowed to have
> id 0
>     > ...this means that UserMerge Extension is no longer available for
> user
>     > deletion; isn't it?
>     >
>     > V
>     >
>     >
>     > Valerio Pelliccioni
>     > W: https://tunearch.org/wiki/User:Valerio_Pelliccioni
>     >
>     >
>     > On 07/01/2020, 20:15, "MediaWiki-l on behalf of Brian Wolff" <
>     > [email protected] on behalf of
> [email protected]>
>     > wrote:
>     >
>     >     Run cleanupUsersWithNoId.php followed by migrateActors.php
> --force
>     >
>     >
>     >     Usernames that are valid usernames are no longer allowed to have
> id 0.
>     >
>     >     --
>     >     Brian
>     >
>     >     On Tuesday, January 7, 2020, Valerio Pelliccioni <
> [email protected]>
>     > wrote:
>     >
>     >     > Hi, everybody,
>     >     >
>     >     > I seem to have lost the user "Anonymous" which is the one with
> the
>     > user_id
>     >     > = 0.
>     >     >
>     >     > I say this because trying to delete a user with the extension
>     > "UserMerge"
>     >     > I got this error:
>     >     >
>     >     > "Cannot create an actor for a usable name that is not an
> existing
>     > user".
>     >     >
>     >     >
>     >     >
>     >     > To be clear, the UserMerge Extension instructs to
>     >     > merge (refer contributions, texts, watchlists, edit count of)
> a first
>     >     > account A to a second account B
>     >     > delete the first account A after the merge
>     >     > ….
>     >     > if you omit the "New User" field (account B) then the extension
>     >     > auto-populates the New User as "Anonymous", and ask you to
> confirm a
>     > merge
>     >     > to Anonymous
>     >     >
>     >     >
>     >     > So I went to check the "user" and "actor" tables where,
> actually, the
>     >     > Anonymous user doesn't exist.
>     >     >
>     >     > Is it serious?
>     >     >
>     >     > Everything else seems to be working fine to me...
>     >     >
>     >     >
>     >     >
>     >     > Valerio Pelliccioni
>     >     >
>     >     > W: https://tunearch.org/wiki/User:Valerio_Pelliccioni
>     >     >
>     >     >
>     >     >
>     >     > _______________________________________________
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