Year-dependent data exists, deletion is not possible

What causes this issue?

You want to delete a plan version for which year-dependent version
parameters have been defined.

System Response

You cannot delete the plan version.

How to fix this error?

First delete the annual values for the plan version using the
transaction 'Change Plan Verson' <DS:TRAN.KP92>Proceed</>.
Note: You can only delete annual values if the relevant fiscal year has
not yet been planned. If planning data already exists, you can
delete them using the 'Archive cost center plan data' program.
<DS:TRAN.OKE3>Proceed</>.

Error message extract from SAP system. Copyright SAP SE.