Could not add an entry to the host authorization table. Attempt to add %1 to the host authorization table failed. Requests ...

Could not add an entry to the host authorization table.

Attempt to add %1 to the host authorization table failed. Requests to this server will likely fail until this problem is resolved.
Cause: The same host may have been manually added to the table, or another application running on this server has added the host.
Resolution:
Manually remove the host from the host authorization table or disable other applications that may have added the host.