Enterprise menu is not up-to-date; generate it again (see long text)

What causes this issue?

The company menu is not current. You should regenerate it using
Transaction SSM1. You must regenerate the company menu after every
release upgrade or each time the area menu changes in which the company
menu is used.
If the company menu has already been generated, use the menu option
<ZH>Generation -> Reset</>.
You can reselect the language in which the company menu should be
generated.
Then execute step 1 again. This generates the SAP standard menu first
of all. This step is a prerequisite for the following steps.
Then generate the company menu (Step 2a) and activate it (Step 2c).
You can also enter the menus in Transaction SSM1 in a transport
request.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.