I use AT on every site and EB on many and this is the first time I've encountered this issue.This is part of the reply from the Akeeba support team:
"I can tell that EasyBlog is trying to write something to the users table. I'm not familiar with EasyBlog, so I don't know what it's trying to write. It is possible that the other installations are configured differently and do not try to write to the users table. That would explain why only this one has the problem."
I suspect the write to the users table happens when a new post (and probably an edit as well) is done and EB writes to the users table to show the post belongs to that specific author/user. Is this a correct assumption?
"I can tell that EasyBlog is trying to write something to the users table. I'm not familiar with EasyBlog, so I don't know what it's trying to write. It is possible that the other installations are configured differently and do not try to write to the users table. That would explain why only this one has the problem."
I suspect the write to the users table happens when a new post (and probably an edit as well) is done and EB writes to the users table to show the post belongs to that specific author/user. Is this a correct assumption?