The integrated login ID guest can only be mapped to the guest database user ID

Error constant SQLE_INTEGRATED_LOGON_GUESTMAP
ODBC 2 State 28000
ODBC 3 State 28000
Severity 16
SQLCODE –247
SQLSTATE 28W06
Sybase error code 13695
Probable cause

You attempted to map the guest login ID to something other than guest.