Update of database record not working

Question

Search works to return page to edit. Data displayed. Changes
allowed on the page. Clicking on the Update button crashes.
Connection checks (in DW8), and so does recordset with any
values tried.
ADODB.Command (0x800A0D5D)
Application uses a value of the wrong type for the current
operation.
/sands2/IDresultsToEdit.asp, line 173
LIne 173 is
MM_editCmd.Parameters.Append(MM_editCmd.CreateParameter("param150",
5, 1, -1, (String(Request.Form("MM_recordId")) != "undefined"
&& String(Request.Form("MM_recordId")) != "") ?
Request.Form("MM_recordId") : null)); // adDouble
I don't know what MM_recordId is. Well, I know it's a
variable generated by DW. I mean, I don't know where it comes from,
what uses it. There is a field called ID. It is an autonumber. On
the Update Record panel, it shows as ID with a check in the box for
numeric. In the DB, it is unique (I checked).
Any help or comments would be appreciated. Any think about
this might give me a clue were to look for something wrong.
Code validates in DW. No errors or warnings found.

Answer 1

I found this code just before the end of the form.
<input type="hidden" name="MM_update" value="form1">
<input type="hidden" name="MM_recordId">
<input type="hidden" name="MM_recordId" value="<%=
rsEditSandS.Fields.Item("id").Value %>">
Is one of the last two a duplicate that I should eliminate?