Msg 544 Level 16 - Cannot drop the table

On Transact SQL language the Msg 544 Level 16 - Cannot insert explicit value for identity column in table means that the IDENTITY_INSERT is set to OFF.

Msg 544 Level 16 Example:

We have the table teachers:

USE model;
GO
CREATE TABLE teachers(
   ID INT IDENTITY NOT NULL PRIMARY KEY,
   Name VARCHAR(250) NOT NULL,
   Department VARCHAR(250) NOT NULL);
GO

Invalid insert:

USE model;
GO
INSERT INTO teachers(id, name, department)
VALUES (1, 'Olivia Wilson', 'Anthropology'), (2,'Ethan Davis', 'Biology');
GO

Message
Msg 544, Level 16, State 1, Line 1
Cannot insert explicit value for identity column in table 'teachers' when IDENTITY_INSERT is set to OFF.

Correct insert:

USE model;
GO
INSERT INTO teachers(name, department)
VALUES ('Olivia Wilson', 'Anthropology'), ('Ethan Davis', 'Biology');
GO

Message
(2 row(s) affected)

Other error messages: