XF 1.0 Server errors have been logged. You should review these. How

ENF

Well-known member
if there's only one error and it's not repeating over and over, it's likely just a one-off error where the server/db tried to process a transaction twice... like clicking on a submit field twice, etc.

Without more information, there's not much we can suggest from the errors generated and shown here.

Mostly likely, it's not a big problem unless you're getting tons of these errors in your server error log.
 
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