XF 1.3 Error by Importing othe Database (Users)

[Tomba9]

Hi, when I try to import Usergroups - OK, but Users ended with :

Fatal error: Allowed memory size of 268435456 bytes exhausted (tried to allocate 1024 bytes) in /www/htdocs/xxxxxxxx/forum/library/Zend/Db/Statement/Mysqli.php on line 295

what can I do ?
Regards

 

[AndyB]

Increase your PHP memory allocation. Currently you have 268MB allocated, increase to twice that.