用户合并失败，第三方插件导致数据库条目损坏

[gerhard (Gerhard Schlager)]

You can update the custom field of that topic and remove the non-existent ID. @angus might want to add support for user merging to his plugin.

@gerhard

Plugin authors can hook into the merge process by handling the :merging_users event. I’ve already implemented it for the polls plugin, which merges the votes of the two merged users.