Can the mvc model layer not throw an exception ??

Can the mvc model layer not throw an exception ?? Someone said to me, "the design model layer for mvc should not perform any errors or other operations. These operations should be completed by c. "

Is that true? Why can't I throw an exception on the M layer? I cannot understand

Reply to discussion (solution)

There are no rules for this.

However, he also said that the model is the business logic. if the model is abnormal, the entire process will be wrong.
Of course, he said: When the model encounters an exception, it only throws and does not handle it. Process to Controller

The control layer calls the model business logic return value and throws an exception accordingly.

This is absolutely true. There is no standard for such things. The M layer can also throw an exception.