Hi,
Please replace in the file "/plugins/acymailing/hikaserial/hikaserial.php", on the line 196
$query = 'INSERT IGNORE INTO ' . acymailing::table('hikaserial_serial') . ' (' . implode(',', array_keys($data)) . ') VALUES (' . implode(',', $data) . ')';
By
$query = 'INSERT IGNORE INTO ' . hikaserial::table('serial') . ' (' . implode(',', array_keys($data)) . ') VALUES (' . implode(',', $data) . ')';
I guess that the function table of acymailing had some little modifications.
I will update the HikaSerial package with the fix as soon as possible.
Regards,