V7.4.2 Error while compute planning - by: Bena

Hello,

I have the following error when I try to compute planning :

2018-10-11 09:53:54.272 ***** ERROR ***** [V7.2.4] EXCEPTION *****
2018-10-11 09:53:54.272 ***** ERROR ***** [V7.2.4] on file '/projeqtor/projeqtor/model/PlannedWork.php' at line (1246)
2018-10-11 09:53:54.272 ***** ERROR ***** [V7.2.4] cause = Call to undefined method GlobalPlanningElement::updateMilestonableItems()
2018-10-11 09:53:54.273 ***** ERROR ***** [V7.2.4] => #0 /projeqtor/projeqtor/tool/plan.php (50) -> plan()

Regards.