Problem is the same as ZBX-12933

It's impossible create template full clone (if there is LLD).

The problem is that it eats up too much memory more than 2GB.

log:

PHP Fatal error:  Allowed memory size of 2147483648 bytes exhausted (tried to allocate 77 bytes) in /usr/share/zabbix/include/classes/api/services/CDiscoveryRule.php on line 1137

Workaround:

Changed (in /zabbix/include/classes/api/services/CDiscoveryRule.php:1137):

foreach ($newPrototypes as $i => $newPrototype) {
   unset($newPrototypes[$i]['templateid']);
}

To:

reset($newPrototypes);

while(current($newPrototypes)){
    unset($newPrototypes[key($newPrototypes)]['templateid']);
    next($newPrototypes);
}

While loop eats less memory, then foreach.

With this solution we achieved that full clone does not eat up memory (and stop crashing), but the cloning process still is taking very long time (you may need to increase execution time).

For us this is problem to clone templates in large system.