Contents Index Cannot insert or update computed column '%1' Cannot modify column '%1' in table '%2'

ASA Error Messages
  Database Error Messages
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Cannot map a login ID to the sys or public user ID

Item Value
SQLCODE -248
Constant SQLE_INTEGRATED_LOGON_SYSMAP
SQLSTATE 28W07
Sybase error code 13696
ODBC 2 State 28000
ODBC 3 State 28000
Probable cause 

You attempted to map a login ID to either sys or public

Contents Index Cannot insert or update computed column '%1' Cannot modify column '%1' in table '%2'