FIM/MIM WAL: Cannot write to the same attribute twice in the same activity

One item I want to mention. In the WAL, You cannot write to the same attribute within the same activity. so if you have

“Denver” = [//Target/Attrib1]

Say you want to clear it (In the same Activity)

Null() = [//Target/Attrib1]

You will get an SQL error, “Cannot create duplicate Key”

You will have to create another activity to do the second write.