[Stefan118]

In the config.php file it should be standard... I did not changed it. Maybe the previous owner, but the last 3 years i own the forum it has not been changed.

What it says is: $config['Datastore']['class'] = 'vB_Datastore_Memcached';

Edit 1:
Ho, wait... It is commented out.
Compleet script part is:
/*
$config['Datastore']['class'] = 'vB_Datastore_Memcached';
$i = 0;
// First Server
$i++;
$config['Misc']['memcacheserver'][$i] = '127.0.0.1';
$config['Misc']['memcacheport'][$i] = 11211;
$config['Misc']['memcachepersistent'][$i] = true;
$config['Misc']['memcacheweight'][$i] = 1;
$config['Misc']['memcachetimeout'][$i] = 1;
$config['Misc']['memcacheretry_interval'][$i] = 15;
*/

Edit 2:
I reuploaded all files.
Tried it again, same error.
Updated and repaired the database, and after that i tried to update the counters.
All were updated fine, exept Rebuilding forum information. Here i got the same 1153 error.
So the problem seems to be in creating, editing, updating etc the forum part.