More than one INDEX key was created for column `postuserid` and `lastpost`

[RaZor Edge]

I have a similar problem like in this thread.

In my case, a check on mysql forum database tell my that:

 
Problems with indexes of table `thread` 
 More than one INDEX key was created for column `postuserid` 
 More than one INDEX key was created for column `lastpost`

These have probably been add by some hack or plugin.

Can you confirm me that I can safely delete the index in red?

PRIMARY  PRIMARY  19788       threadid  
forumid  INDEX  19788       forumid  visible  sticky  lastpost  
postuserid  INDEX  638       postuserid  
[COLOR=red]postuserid_2  INDEX  638       postuserid  
[/COLOR]pollid  INDEX  989       pollid  
lastpost  INDEX  19788       lastpost  
[COLOR=red]lastpost_2  INDEX  19788       lastpost  forumid[/COLOR]  
dateline  INDEX  19788       dateline

Thanks!

[Steve Machol]

Yes. You can delete: postuserid_2 and lastpost_2