problem function calculates resource planning

Something is changed. Indeed there were errors of consistency that I set with the appropriate button. Now the errors are these:

[Thu Oct 03 14:56:36.728647 2019] [php7:error] [pid 2774] [client 192.168.12.1:62240] PHP Fatal error: Allowed memory size of 536870912 bytes exhausted (tried to allocate 36864 bytes) in /var/www/html/projeqtor/model/PlannedWork.php on line 665, referer: http://192.168.12.137/projeqtor/view/main.php

[Thu Oct 03 14:56:36.734946 2019] [php7:error] [pid 2774] [client 192.168.12.1:62240] PHP Fatal error: Allowed memory size of 536870912 bytes exhausted (tried to allocate 32768 bytes) in Unknown on line 0, referer: http://192.168.12.137/projeqtor/view/main.php

I have set et 8000 the global variable and now appear this :
[Thu Oct 03 16:37:40.348001 2019] [php7:error] [pid 3463] [client 192.168.12.1:63100] PHP Fatal error: Allowed memory size of 536870912 bytes exhausted (tried to allocate 20480 bytes) in /var/www/html/projeqtor/model/persistence/SqlElement.php on line 3016, referer: http://192.168.12.137/projeqtor/view/main.php
[Thu Oct 03 16:37:40.354904 2019] [php7:error] [pid 3463] [client 192.168.12.1:63100] PHP Fatal error: Allowed memory size of 536870912 bytes exhausted (tried to allocate 20480 bytes) in Unknown on line 0, referer: http://192.168.12.137/projeqtor/view/main.php

thank you very much for your kindness and patience

where can the problem be in:
/var/www/html/projeqtor/model/persistence/SqlElement.php on line 3016 ???