error in wp-db.php and pluggable.php

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Hi and thank you,

I tried to replace the two files but it does not change.
I also check my config file if there was nothing before it but to look right.

By cons I forgot to copy this, that to be important?

Warning: Error while sending QUERY packet. PID=19927 in /xxxx/wp-includes/wp-db.php on line 1811