"Debugging and troubleshooting", "List of MyChat Client errors", " Error #0153".
 

Error

Error #0153: user UIN XX has already in the moderators list

 

Error description

An error occurred while adding the moderator for all chat conferences, a person has already received such a status.

 

Problem solution

Most likely you are trying to give a status of moderator for all chat conferences to the user again, or your software does not work correctly with the open MyChat protocol.