5.2.0.CR1 creates incorrect drl from decision table. With 5.1.0.M1 the drl for the same decision table is correct.

Wrong DRL from 5.2.0.CR1:
rule "ProcessState"
salience 65522
ruleflow-group "CompleteSubOrder"
activation-group "ProcessState"
when
$m:ModifiedMarker(processState==null, state ==null)
$s:SubOrder
then
$m.setIsModified(true);
$s.setProcessState(ProcessState.CREATED);

end

Correct DRL with 5.1.0.M1:
rule "ProcessState"
salience 65522
ruleflow-group "CompleteSubOrder"
activation-group "ProcessState"
when
$m:ModifiedMarker()
$s:SubOrder(processState==null, state ==null)
then
$m.setIsModified(true);
$s.setProcessState(ProcessState.CREATED);

end

The difference is that the constraints are put to $m instead of putting them to $s.

The behaviour in 5.2.0.CR1 is the same for all decision tables in my project and prevents me from upgrading to newer drools versions.