V7.4.3

I've got pb when I want to create an activity:

2019-03-11 17:25:32.620 ***** ERROR ***** [V7.4.3] Exception-[42S22] SQLSTATE[42S22]: Column not found: 1054 Unknown column 'wesum.idActivty' in 'where clause'
2019-03-11 17:25:32.620 ***** ERROR ***** [V7.4.3] For query : SELECT pe.refType as reftype, pe.refId as refid, pe.realWork as realwork, pe.leftWork as leftwork, pe.plannedWork as plannedwork, coalesce((select sum(work) from work w where w.refType=pe.refType and w.refId=pe.refId),0)+coalesce((select sum(pesum.realWork) from planningelement pesum where pesum.topId=pe.id),0)+coalesce((select sum(wesum.realWork) from workelement wesum where pe.refTYpe='Project' and wesum.idProject=pe.id and wesum.idActivty is null),0) as sumwork FROM planningelement pe WHERE pe.isManualProgress=0 and realwork!=coalesce((select sum(work) from work w where w.refType=pe.refType and w.refId=pe.refId),0)+coalesce((select sum(pesum.realWork) from planningelement pesum where pesum.topId=pe.id),0) +coalesce((select sum(wesum.realWork) from workelement wesum where pe.refTYpe='Project' and wesum.idProject=pe.id and wesum.idActivty is null),0) OR (pe.realWork+pe.leftWork)!=pe.plannedWork
2019-03-11 17:25:32.620 ***** ERROR ***** [V7.4.3] Strack trace :
2019-03-11 17:25:32.620 ***** ERROR ***** [V7.4.3] #0 Sql->query called at [/var/www/projeqtor/model/Consistency.php:367]
2019-03-11 17:25:32.620 ***** ERROR ***** [V7.4.3] #1 Consistency->checkWorkOnActivity called at [/var/www/projeqtor/tool/adminFunctionalities.php:104]
2019-03-11 17:25:32.620 ***** ERROR ***** [V7.4.3] #2 include called at [/var/www/projeqtor/view/print.php:219]

Hello,
I couldn't create new activity, it is a very bad problem for us. Do you know what's happen ?

Yes I'd clean the cache, but noway, always problem to create activities...

Is it possible to downgrade to 7.4.2 ?

2019-03-13 11:19:20.730 ***** ERROR ***** [V7.4.3] Exception-[42S22] SQLSTATE[42S22]: Column not found: 1054 Unknown column 'wesum.idActivty' in 'where clause'
2019-03-13 11:19:20.730 ***** ERROR ***** [V7.4.3] For query : SELECT pe.refType as reftype, pe.refId as refid, pe.realWork as realwork, pe.leftWork as leftwork, pe.plannedWork as plannedwork, coalesce((select sum(work) from work w where w.refType=pe.refType and w.refId=pe.refId),0)+coalesce((select sum(pesum.realWork) from planningelement pesum where pesum.topId=pe.id),0)+coalesce((select sum(wesum.realWork) from workelement wesum where pe.refTYpe='Project' and wesum.idProject=pe.id and wesum.idActivty is null),0) as sumwork FROM planningelement pe WHERE pe.isManualProgress=0 and realwork!=coalesce((select sum(work) from work w where w.refType=pe.refType and w.refId=pe.refId),0)+coalesce((select sum(pesum.realWork) from planningelement pesum where pesum.topId=pe.id),0) +coalesce((select sum(wesum.realWork) from workelement wesum where pe.refTYpe='Project' and wesum.idProject=pe.id and wesum.idActivty is null),0) OR (pe.realWork+pe.leftWork)!=pe.plannedWork
2019-03-13 11:19:20.730 ***** ERROR ***** [V7.4.3] Strack trace :
2019-03-13 11:19:20.730 ***** ERROR ***** [V7.4.3] #0 Sql->query called at [/var/www/projeqtor/model/Consistency.php:367]
2019-03-13 11:19:20.730 ***** ERROR ***** [V7.4.3] #1 Consistency->checkWorkOnActivity called at [/var/www/projeqtor/tool/adminFunctionalities.php:104]
2019-03-13 11:19:20.730 ***** ERROR ***** [V7.4.3] #2 include called at [/var/www/projeqtor/view/print.php:219]