UUID vs customer Primary Key

Hello,

I am developing an application for 5 different locations.

Each location will have it's own mysql server and application will manually copy each record to Master Server which is VPS.

Please suggest me best way to use Primary Key.

Option 1.

Location based Primary key e.g. Location 1 will have A001 Record and Location 2 will have B001

Option 2.

uuid. I am confused that UUID will be unique across all servers?

Thanks & Regards,

Sanjeev Divekar

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