Unencryption with BES or DataFort and then encryption with NBU question

If a customer is unencrypting all their tapes using NetApp DataFort and a Brocade Encryption Switch (these platforms did the initial encryption and both are EOL), and then if the customer encrypts these tapes using NBU, will the new encrypting of these tapes affect the NBU catalogue. Will the re-indexing happen properly?

(I hope the question makes sense)