Is there any established way or process to assign assets to contracts?

I had an inconvenience with the SD+ upgrade from 9049 to 9307 we used to use the barcode field to link

assets to contracts, with the new functionalities and after the upgrade the barcode for all the assets is now consecutive for those that had

the same barcode description and it does not allow repeated barcodes and Asset admin does not like consecutive barcodes...

Is there any recommendation that you can suggest so I can repeat barcodes?

What can I do with the barcode column now that they are all consecutive instead of the same barcode name?

Please let me know if you need any more details.