Unable to discard or cancel PI sheet &1

What causes this issue?

The PI sheet &V1& could not be discarded/canceled. V2&&V3&&V4&
PI sheets can only be discarded/canceled if:
You have the relevant authorization
The PI sheet is not being locked by another user
The PI sheet has status "New", "In process", oder "To be completed"
It is a browser-based PI sheet. Discarding/canceling list-based PI
sheets is not suppperted.

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?

To discard list-based PI sheets, you must first call up the PI sheet in
the change mode and then choose <LS>Discard/cancel</>.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.