Server error when creating a Service Record

Hello.

I get the following response when I try to create a Ticket (i.e. Service Record)

{
    "status": 500,
    "message": "java.util.LinkedHashMap cannot be cast to java.lang.String"
}

I’m doing a POST to the following endpoint: https://myurl/api/v1/sr?fields=id

The JSON Body that I’m sending is:

{
    "info": [
        {
            "key": "cust_list1",
            "value": "3"
        },
        {
            "key": "CustomColumn12sr",
            "value": "7"
        },
        {
            "key": "agreement",
            "value": "1"
        },
        {
            "key": "impact",
            "value": "2"
        },
        {
            "key": "priority",
            "value": "4"
        },
        {
            "key": "problem_type",
            "value": "Solutions_SAP%20-%20Jobs"
        },
        {
            "key": "CustomColumn19sr",
            "value": "1"
        },
        {
            "key": "update_user",
            "value": "582"
        },
        {
            "key": "submit_user",
            "value": "582"
        },
        {
            "key": "responsibility",
            "value": "582"
        },
        {
            "key": "request_user_name",
            "value": "582"
        },
        {
            "key": "request_user",
            "value": "582"
        },
        {
            "key": "CustomColumn15sr",
            "value": "1"
        },
        {
            "key": "account_id",
            "value": "our_account_id"
        },
        {
            "key": "sr_type",
            "value": "1"
        },
        {
            "key": "quick_name",
            "value": "Test ticket, please ignore - 2024-02-19"
        },
        {
            "key": "title",
            "value": "Test ticket, please ignore - 2024-02-19"
        },
        {
            "key": "source",
            "value": "1"
        },
        {
            "key": "CustomColumn18sr",
            "value": "1"
        },
        {
            "key": "project_id",
            "value": {
                "321": "PM Tool",
                "311": "JSOX control execution",
                "317": "User Access monitoring"
            }
        },
        {
            "key": "cust_int2",
            "value": "0"
        },
        {
            "key": "description",
            "value": "The following SAP jobs failed on 2024-02-19,   [WMS AUTO TRANSFER ORD 2 - WPSB] "
        },
        {
            "key": "urgency",
            "value": "5"
        },
        {
            "key": "sub_type",
            "value": "5"
        },
        {
            "key": "department",
            "value": "1"
        },
        {
            "key": "CustomColumn7sr",
            "value": "JOBLGX00071400X01548,    JOBLGX23570201X64811,   JOBLGX23581000X37707,   "
        }
    ]
}

Any help would be greatly appreciated

Rudy