Issue in UNWIND option for duplicate records about opencypher HOT 2 CLOSED

UNWIND [{userId:'123', firstName:'Devika',status:'Active'}, {userId:'123', firstName:'Devika',status:'Suspended'},  {userId:'123', firstName:'Devika',status:'Terminated'}] as users 
OPTIONAL MATCH(p:USER{userId:users.userId})
WITH p, coalesce(p{.*},{status:''}) as prevData, users
MERGE (m:USER { userId:users.userId })
ON CREATE SET  m.firstName=users.firstName,
m.status = users.status  
ON MATCH SET  m.firstName=users.firstName,
m.status = users.status 
with prevData, m
CALL apoc.do.when((prevData.status <> m.status), "CREATE (his:UserHistory{historyCode:\"DSC\",oldValue:prevData.status,newValue:m.status, userId:m.userId, rowStatusId:1})" ,"return null", {prevData:prevData, m:m}) yield value
return value

╒═══════════════╤═══════════════════════════════════════════════════════════════════════════════════════════╕
│"labels(n)"    │"properties(n)"                                                                            │
╞═══════════════╪═══════════════════════════════════════════════════════════════════════════════════════════╡
│["USER"]       │{"firstName":"Devika","userId":"123","status":"Terminated"}                                │
├───────────────┼───────────────────────────────────────────────────────────────────────────────────────────┤
│["UserHistory"]│{"newValue":"Active","historyCode":"DSC","rowStatusId":1,"oldValue":"","userId":"123"}     │
├───────────────┼───────────────────────────────────────────────────────────────────────────────────────────┤
│["UserHistory"]│{"newValue":"Suspended","historyCode":"DSC","rowStatusId":1,"oldValue":"","userId":"123"}  │
├───────────────┼───────────────────────────────────────────────────────────────────────────────────────────┤
│["UserHistory"]│{"newValue":"Terminated","historyCode":"DSC","rowStatusId":1,"oldValue":"","userId":"123"} │
└───────────────┴───────────────────────────────────────────────────────────────────────────────────────────┘

UNWIND [{userId:'123', firstName:'Devika',status:'Active'}, {userId:'123', firstName:'Devika',status:'Suspended'},  {userId:'123', firstName:'Devika',status:'Terminated'}] AS user
CALL { // Use a subquery to ensure that all of this runs per row before the next row
  WITH user
  OPTIONAL MATCH(p:USER{userId:user.userId})
  WITH coalesce(p.status,'') AS prevStatus, user
  MERGE (m:USER{userId:user.userId})
  // Since we set the same thing on both MATCH and CREATE, we don't need for the SET to be conditional
  SET m.firstName = user.firstName, m.status = user.status
  RETURN prevStatus
}
CREATE (:UserHistory{historyCode:'DSC', oldValue:prevStatus, newValue:user.status, userId:user.userId, rowStatusId:1})

╒═══════════════╤═══════════════════════════════════════════════════════════════════════════════════════════════════╕
│"labels(n)"    │"properties(n)"                                                                                    │
╞═══════════════╪═══════════════════════════════════════════════════════════════════════════════════════════════════╡
│["USER"]       │{"firstName":"Devika","userId":"123","status":"Terminated"}                                        │
├───────────────┼───────────────────────────────────────────────────────────────────────────────────────────────────┤
│["UserHistory"]│{"newValue":"Active","historyCode":"DSC","rowStatusId":1,"oldValue":"","userId":"123"}             │
├───────────────┼───────────────────────────────────────────────────────────────────────────────────────────────────┤
│["UserHistory"]│{"newValue":"Suspended","historyCode":"DSC","rowStatusId":1,"oldValue":"Active","userId":"123"}    │
├───────────────┼───────────────────────────────────────────────────────────────────────────────────────────────────┤
│["UserHistory"]│{"newValue":"Terminated","historyCode":"DSC","rowStatusId":1,"oldValue":"Suspended","userId":"123"}│
└───────────────┴───────────────────────────────────────────────────────────────────────────────────────────────────┘