Error in structure persistence - reference element & already exists

What causes this issue?

The structure persistence saves recorded structures in separate tables.
A reference element is created in the workflow container for this
purpose.
The creation of the reference element returns an error since there is
already an element with this name in the container.

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?

Change the name of the container element that the structure receives in
the workflow definition. Do not use any more than 27 characters for the
name.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.