Cannot insert explicit value for identity column in table ‘%1!’ when IDENTITY_INSERT is set to OFF.

Error Message:
Msg 544, Level 16, State 1, Line 1
Cannot insert explicit value for identity column in table ‘%1!’ when IDENTITY_INSERT is set to OFF.

Severity level:
16.

Description:
This error message appears when you try to insert a value into a column for which the IDENTITY property was declared, but without having set the IDENTITY_INSERT setting for the table to ON.

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

Resolution:
Error of the Severity level 16 are generated by the user and can be fixed by the SQL Server user. The SET IDENTITY_INSERT setting must be turned on.

Versions:
All versions of SQL Server.

Example(s):
USE tempDB
GO

CREATE TABLE t
(
 i1 INT IDENTITY
)
GO
INSERT INTO t(i1) SELECT -1
DROP TABLE t
GO

Remarks:
To run the above batch free of errors, it must be rewritten to:
USE tempDB
GO

CREATE TABLE t
(
 i1 INT IDENTITY
)
GO
SET IDENTITY_INSERT t ON
INSERT INTO t(i1) SELECT -1
SET IDENTITY_INSERT t OFF
DROP TABLE t
GO

When you set the IDENTITY_INSERT setting to on without specifying a column list in the INSERT statement,  SQL Server raises error 8101.




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