You have no authorization to delete all selected selection versions.

What causes this issue?

You want to delete one or more selection versions, although you do not
have authorization to do so.

System Response

Only those selection versions are deleted, for which you have
authorization to delete.

How to fix this error?

You need an expanded authorization to the authorization object
M_IS_SELVS for action 06 (field ACTVT), that allows deletion of these
selection versions.

Error message extract from SAP system. Copyright SAP SE.