items are not updated in merge query

items are not updated in merge query
cbq> select meta(b0).id, click from b0 ;
{
"request_id": "6315dc36-691e-467c-baa2-941afd277048",
"signature":

{ "click": "json", "id": "json" }

,
"results": [

{ "click": "to edit", "id": "d1" }

,

{ "click": "to edit", "id": "d2" }

],
"status": "success",
"metrics":

{ "elapsedTime": "8.628ms", "executionTime": "8.503ms", "resultCount": 2, "resultSize": 132 }

}

cbq> select meta(b1).id, click from b1 ;
{
"request_id": "a0c5b802-a274-4361-b2c2-bfd7d4ee5771",
"signature":

{ "click": "json", "id": "json" }

,
"results": [

{ "click": "to edit", "id": "d0" }

,

{ "click": "to edit", "id": "d1" }

],
"status": "success",
"metrics":

{ "elapsedTime": "6.653ms", "executionTime": "6.534ms", "resultCount": 2, "resultSize": 132 }

}

cbq> merge into b0 using b1 on key "d1" when matched then update set b0.click='abc';

{
"request_id": "00e61c66-1c52-46e0-85f2-467800db4924",
"signature": null,
"results": [
]
"errors": [

{ "code": 5000, "msg": "Failed to perform update - cause: MCResponse status=KEY_ENOENT, opcode=GET, opaque=0, msg: Not found" }

],
"status": "errors",
"metrics":

{ "elapsedTime": "10.622ms", "executionTime": "10.501ms", "resultCount": 0, "resultSize": 0, "errorCount": 1 }

}

cbq> select meta(b0).id, click from b0 ;
{
"request_id": "ca2f9d20-a8e7-4c34-b5ad-54bf55e18b4b",
"signature":

{ "click": "json", "id": "json" }

,
"results": [

{ "click": "to edit", "id": "d1" }

,

{ "click": "to edit", "id": "d2" }

],
"status": "success",
"metrics":

{ "elapsedTime": "8.28ms", "executionTime": "8.151ms", "resultCount": 2, "resultSize": 132 }

}

cbq> select meta(b1).id, click from b1 ;
{
"request_id": "1dd1c01e-f1af-4958-afcf-4f5f0f37ccf0",
"signature":

{ "click": "json", "id": "json" }

,
"results": [

{ "click": "to edit", "id": "d0" }

,

{ "click": "to edit", "id": "d1" }

],
"status": "success",
"metrics":

{ "elapsedTime": "5.797ms", "executionTime": "5.69ms", "resultCount": 2, "resultSize": 132 }

}