Create not allowed

What causes this issue?

The system tried to create a new segment definition or to change an
existing segment definition which is already released. A new segment
definition is automatically created when a released segment definition
is changed. However, only one segment definition is permitted for each
segment in each SAP release. In the current Release &v1&, segment
definition &v2& already exists for the current segment.

System Response

An additional segment definition can only be created for the next
release.

How to fix this error?

If changes must be made to the segment definition, the release of the
last segment definition can be canceled and the enhancements entered.
Changes to SAP segments may only be made by SAP.
The customer enhancement concept is intended to be used for
enhancements to existing SAP segments. You are advised to find out more
about the options available when using this concept.

Error message extract from SAP system. Copyright SAP SE.