Requirement : To update the Array Column for all those which is having one of the key value as empty

details_array in table looks like below

DETAILS_ARRAY

[
  {
    "dl_country": "",
    "typeid": "U"
  }
]

Tried as below statement to update the key value but in vain

MERGE INTO tgt
USING (
  SELECT a_id, d_id, dl_country
  FROM doc_fix
  WHERE a_id = 12321 AND d_id = 88899
) src 
ON tgt.a_id = src.a_id AND tgt.d_id = src.d_id
WHEN MATCHED THEN
  UPDATE SET 
  DETAILS_ARRAY = OBJECT_INSERT(tgt.DETAILS_ARRAY,'dl_country', src.dl_country)
;

Error:

Invalid argument types for function 'OBJECT_INSERT': (ARRAY, VARCHAR(21), VARCHAR(16777216), BOOLEAN)

Above is the example for one id , but i need to update all id’s having empty string in the dl_country field