How to delete Unused EARFCN relation in Ericsson System?

Dear Experts,
How to delete Unused EARFCN relation in Ericsson System?
We have tried multiple times, but when we switch ANR back, again relations are created.

ANR relation need to be black listed after deletion.
Set ishoallowed to false for the relation.

We actually want to permanently delete the relation.
But it is recreating.

Are you seeing attempts with those relations even after setting ishoallowed ‘false’?

You cannot delete a freq as long as there are external cells with that freq.
You cannot delete externalcells as long as there are handover relations to that external cell.

Yup… Is there any possibility from Core end?

If ANR recreate the relation then it is not “unused”