Error while restoring database

I have installed erpnext and its version is 13.55.2 and my old erpnext server having version 13.6.0. when I am restoring the old erpnext database to the newly installed server, it showing an error:

ERROR 2006 (HY000) at line 6920: Server has gone away
Table ‘tabDefaultValue’ missing in the restored site. Database not installed correctly, this can due to lack of permission, or that the database name exists. Check your mysql root password, validity of the backup file or use --force to reinstall

How can I resolve it?