You do not have authorization to delete group &

What causes this issue?

You want to delete planner profile &V2&. This profile is assigned to
authorization group &V1& and is therefore protected against various
activities.
To delete profile &V2&, you must have a delete authorization for
authorization group &V1&.
In the user master data for user &V3&, the authorization for deleting
in authorization group &V1& is not entered. Profile &V2&, therefore,
cannot be deleted by you.

System Response

The authorization object for planner profiles is named K_TKA50 and is
made up of the authorization group and the activity with the value &V4&
for the delete authorization.

How to fix this error?

Contact the system administrator to receive a delete authorization from
authorization group &V1& for your user master data.

Error message extract from SAP system. Copyright SAP SE.