it seems that the original database collation is not available on the new server. First of all I'd suggest to contact your host and ask them if it's possible to add it; most likely they will tell you that it's not possible, but maybe it's worth trying.
The other option is to change the collation to something that is supported by your new database. While restoring, first try by checking the option Allow UTF8MB4 auto-detection.
If it's still failing, your last resort is to use UTF-8, but please note that you could have some mangled characters if you used emojis or special Chinese chars. Please check the option Force UTF-8 collation on database and DO NOT check the option Allow UTF8MB4 auto-detection.
That should fix your issue, let me know how it goes.
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