[Message (Optional)] A mutation operation in the transaction failed because a constraint was not satisfied. For example, an object such as an object store or index already exists and a request attempted to create a new one. [Type] 
ConstraintError
U n k n o w n E r r o r
C o n s t r a i n t E r r o r
D a t a E r r o r
T r a n s a c t i o n I n a c t i v e E r r o r
R e a d O n l y E r r o r
V e r s i o n E r r o r