@kolate_sambhaji solid method, me, I’m ‘terrified’ of updates even after so many years 
. I tried this and put the steps up a while ago, I succeeded with it several times : Alternate Strategy to Update ERPNext to current ~v11
This above; actually takes a different path from a standard update/upgrade, well spoiler; as at today it appears to be failing, but I’m going to run it again. I cannot trust my current internet connection so, I cannot say it doesn’t work, so @bkm if this is worth your while; you may want to try this route. One thing I noticed is there were major changes sometime after I posted this; example, the item table doesn’t hold the barcodes, rather they’re in another table, so one import I made some while ago; items had no barcodes, shocker! Sometimes I wonder why that barcode wasn’t left and the table just added with the alternate barcodes, primary and alternates.
If you’re comfortable with thereafter inserting the records then you may give it a shot.
I doubt you can get 100% assurance of something that will work but you may need to try a mix of methods… I think.
Sometimes when you force and manipulate things, it may finally work but you may have some issues. Recently I had one and that will simply not bring up items to POS, I smelt a rat earlier because I had to ‘patch’ a lot of funny behaviors.