Cannot bind a default to a column created with or altered to have a default value.

Error Message:
Msg 15103, Level 16, State 1, Procedure sp_bindefault, Line 178
Cannot bind a default to a column created with or altered to have a default value.

Severity level:
16.

Description:
This error message appears when you try to bind a via CREATE DEFAULT generated default to a column that has already a default constraint defined.

Consequences:
The T-SQL statement can be parsed, but causes the error at runtime.

Resolution:
Errors of the Severity Level 16 are generated by the user and are corrigible by the user. The statement cannot be executed this way. Each column can only have one default value.

Versions:
All versions of SQL Server.

Example(s):
USE tempdb;
GO
IF OBJECT_ID('tempdb..#t') > 0
 DROP TABLE #t
GO
IF OBJECT_ID('MyDefault') > 0
 DROP DEFAULT MyDefault;
GO
CREATE TABLE #t
(
 c1 INT NOT NULL
 CONSTRAINT DF_#t_c1 DEFAULT(0)
)
GO
CREATE DEFAULT MyDefault AS 42;
Go
EXEC sp_bindefault 'MyDefault', '#t.c1';

Remarks:
in the above example we try to bind the default MyDefault to the column c1. Because this column already has a default constraint defined on it, the error is raised.