POST time series data 500 error instead of "Incoming data has multiple values for same minute"

When submitting a POST request for time series data, duplicate values within the same minute currently return a generic 500 Internal Server Error. Instead, the web console should display a more descriptive message:

ERROR: Incoming data has multiple values for the same minute.

{
    "name": "Rend Lk-Big Muddy.Stage.Inst.30Minutes.0.cwms-data-upload",
    "office-id": "MVS",
    "units": "ft",
    "values": [
        [
            "2026-11-29T07:30:00.000Z",
            951,
            0
        ],
        [
            "2026-11-29T08:00:00.000Z",
            952,
            0
        ],
        [
            "2026-11-29T08:30:00.000Z",
            953,
            0
        ],
        [
            "2026-11-29T09:00:00.000Z",<--------------------
            954,
            0
        ],
        [
            "2026-11-29T09:00:00.000Z",<--------------------
            954,
            0
        ]
    ]
}

cwms.cda.data.dao.AuthDao.prepareContextWithUser Validated Api Key for user=[CONTEXT ratelimit_period="5 SECONDS [skipped: 10]" ]
15-Jun-2026 14:59:09.840 SEVERE [ajp-nio-127.0.0.1-8009-exec-438] cwms.cda.api.TimeSeriesController.create -8388787327655537121: Internal Error
	org.jooq.exception.DataAccessException: SQL [{ call "CWMS_20"."CWMS_TS"."ZSTORE_TS" (?, ?, ?, ?, ?, cast(? as date), ?, ?) }]; ORA-20998: ERROR: ORA-06512: at "CWMS_20.CWMS_ERR", line 80
ORA-06512: at "CWMS_20.CWMS_TS", line 5808
ORA-06512: at "CWMS_20.CWMS_ERR", line 80
ORA-06512: at "CWMS_20.CWMS_TS", line 7096
ORA-20998: ERROR: Incoming data has multiple values for same minute.
ORA-06512: at "CWMS_20.CWMS_ERR", line 80
ORA-06512: at "CWMS_20.CWMS_TS", line 5808
ORA-06512: at "CWMS_20.CWMS_TS", line 5459
ORA-06512: at "CWMS_20.CWMS_TS", line 9633`

{
  "message": "Internal Error",
  "incidentIdentifier": "89753708-3291-4680-bc3c-ea312b1a7920",
  "source": "Unknown",
  "details": {}
}

🔥 Error during API processing: Error: HTTP 500: 
{"message":"Internal Error","incidentIdentifier":"-8064202843547236245","details":{}}
at createTS (cwms-data-upload.js:348:31)
    at async saveBtn.onclick (cwms-data-upload.js:427:21)

Start with the API failure at TimeSeriesController.create and the client flow in cwms-data-upload.js, especially createTS and saveBtn.onclick. Trace how the duplicate-minute database error becomes the generic response, then verify that the web console displays “Incoming data has multiple values for same minute” instead of “Internal Error” for the supplied request.