Common build numbers include:
You likely used HOME_CSC instead of the full CSC file. Re-flash using the regular CSC_*.tar.md5 file. This will wipe your data but fix the bootloop. sm-t387aa firmware
Are you looking to to a newer Android version or fix a boot loop on your tablet? Download firmware Galaxy Tab A 8.0 2018 SM-T387AA Common build numbers include: You likely used HOME_CSC