CWSCA8017E   The activity session qualifiers that are defined for the interface and for the implementation do not match.

Double-click the error message. Right-click the selected component and choose Show in Properties. In the Properties view, on the Details tab, select the interface in the tree. Select the Qualifiers tab and then select the join activity session qualifier. Where its properties are shown, change the value. Alternatively, on the Implementation tab, select the Qualifiers tab and then select the activity session qualifier. Change the value of the activity session qualifier to match the value of the join activity session qualifier for the interface.