Add Barcodes to pre-existing items in Sharepoint List

Hello,

I have been trying to apply barcodes and barcode values to all the items in my list in sharepoint. As of now, I was able to add sharepoint generated barcodes to all but 58 items in my list. Is there a way I can get barcodes for those remaining 58 items? I have tried a trigger column to modify each item in hopes the barcode would appear upon modification but it only works sometimes.

Any help is appreciated, thank you!