Imported archives from old machine fail, but don't

Every archive I’ve imported hangs at provisioning wp-cli, but the logs indicate an issue with mySQL:

Mar 1, 2017, 7:50 PM GMT - info: [main/verify-wp-cli] Verifying WP-CLI for daefe3cf442649522ed8befd5f8f07130898a9e0fc8f976b40de732552e99720.
Mar 1, 2017, 7:50 PM GMT - warn: [main/index] Unhandled Rejection at: Promise Promise {
{ stdout: ‘’,
stderr: ‘\n** (myloader:813): CRITICAL : Error restoring local.user from file local.user.sql: Duplicate entry ‘localhost-root’ for key ‘PRIMARY’\n\n (myloader:813): CRITICAL : Error restoring local.help_category from file mysql.help_category.sql: Duplicate entry ‘1’ for key ‘PRIMARY’\n\n (myloader:813): CRITICAL : Error restoring local.help_relation from file mysql.help_relation.sql: Duplicate entry ‘0-1’ for key ‘PRIMARY’\n\n (myloader:813): CRITICAL : Error restoring local.help_keyword from file mysql.help_keyword.sql: Duplicate entry ‘0’ for key ‘PRIMARY’\n\n (myloader:813): CRITICAL : Error restoring local.proxies_priv from file mysql.proxies_priv.sql: Duplicate entry ‘localhost-root–’ for key ‘PRIMARY’\n\n (myloader:813): CRITICAL : Error restoring local.help_topic from file mysql.help_topic.sql: Duplicate entry ‘0’ for key ‘PRIMARY’\n’ } } reason:
{ stdout: ‘’,
stderr: '\n
(myloader:813): CRITICAL : Error restoring local.user from file local.user.sql: Duplicate entry ‘localhost-root’ for key ‘PRIMARY’\n\n (myloader:813): CRITICAL : Error restoring local.help_category from file mysql.help_category.sql: Duplicate entry ‘1’ for key ‘PRIMARY’\n\n (myloader:813): CRITICAL : Error restoring local.help_relation from file mysql.help_relation.sql: Duplicate entry ‘0-1’ for key ‘PRIMARY’\n\n (myloader:813): CRITICAL : Error restoring local.help_keyword from file mysql.help_keyword.sql: Duplicate entry ‘0’ for key ‘PRIMARY’\n\n (myloader:813): CRITICAL : Error restoring local.proxies_priv from file mysql.proxies_priv.sql: Duplicate entry ‘localhost-root–’ for key ‘PRIMARY’\n\n (myloader:813): CRITICAL **: Error restoring local.help_topic from file mysql.help_topic.sql: Duplicate entry ‘0’ for key ‘PRIMARY’\n’ }
Mar 1, 2017, 7:50 PM GMT - info: [main/hosts-helper] hostsHelper: Updated hosts. Updated hosts file at /etc/hosts

Suggestions?

I have all my backup files to import, but not the old machine to make new backups from.

closing and re-opening the application shows the site apparently working, but it’s a bit hit and miss. - some of the name changes aren’t working either - I discovered that all my sites (which were created from a template) are backed up with the name of the template, so I have to rename them on import… A separate bug…