should barcode in scRNAseq be deleted when demultiplexing

I demultiplex fastq files using the demultiplex program ,and find the result didn’t delete barcode, I want to ask if it is necessary to delete the barcode in RNAseq. any suggestion is appreciated!

If you have already demultiplexed your samples I see no reason for you to keep the barcode information. Unless you plan to do some kind of barcode error correction (e.g. hamming distance collapsing). Having a random 8-mer present in your sequences will definitely bias any downstream alignments. Again, assuming that this read 2 is being aligned to the genome/transcriptome.