Contents Index Cannot map a login ID to the sys or public user ID Cannot modify publication entry using ALTER SYNCHRONIZATION

ASA Error Messages
  Database Error Messages
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Cannot modify column '%1' in table '%2'

Item Value
SQLCODE -191
Constant SQLE_CANNOT_MODIFY
SQLSTATE 42W32
Sybase error code 230
ODBC 2 State 42000
ODBC 3 State 42000
Parameter 1 Name of the column that cannot be changed.
Parameter 2 Name of the table containing the column.
Probable cause 

You may have tried to modify a column that you do not have permission to modify. You may have tried to modify a column defined as an expression (such as column1+column2) in a view.

Contents Index Cannot map a login ID to the sys or public user ID Cannot modify publication entry using ALTER SYNCHRONIZATION