F&O - Reverted bank account number modifications

Original query, unchanged.

let detection_window = 24h;
let query_frequency = 15m;
let bank_changes = FinanceOperationsActivity_CL
    | where LogType == "Update" and TableName == "BankAccountTable"
    | extend AccountId = tostring(parse_json(tostring(FormattedData.AccountID)).NewData)
    | extend AccountNum = parse_json(tostring(FormattedData.AccountNum))
    | extend
        CurrentAccountNum = tostring(AccountNum.NewData),
        OldAccountNum = tostring(AccountNum.OldData)
    | where CurrentAccountNum != OldAccountNum;
bank_changes
| join kind=inner (bank_changes
    | where TimeGenerated >= ago(query_frequency)
    | project-rename UpdatedTime = LogCreatedDateTime, UpdatedAccount = CurrentAccountNum)
    on $left.OldAccountNum == $right.UpdatedAccount
| where UpdatedTime between (LogCreatedDateTime .. (LogCreatedDateTime + detection_window))
| extend FinOpsAppId = 32780
| project
    TimeGenerated,
    LogCreatedDateTime,
    LogType,
    TableName,
    Username,
    AccountId,
    CurrentAccountNum,
    OldAccountNum,
    FinOpsAppId