Not understanding the use of nestedProperties() for new entry

[cfgeek]

Hi all,

So my question is pretty simple I think and yet I don't seem to understand what's going on. I have an question model and an answer model and the question model has hasMany('answers') and the answer model has a belongsTo('question). The question model has a nestedProperties(associations="answers", sortProperty="position", allowDelete=true);. When I create my form for creating a new question I am including a partial #includePartial(variables.question.answers)#. Then problem is when the partial does its job it generates a field with this long lumber in it: 2147483647

<textarea class="form-control" data-parsley-required="true" id="question-answers-2147483647-title" name="question[answers][2147483647][title]" placeholder="Answer" style="height:50px"></textarea>

Then when I submit and save it adds the new question fine but it adds the answer with this number as its id, which it should be making a new answer and auto assigning a id. I left out several other fields for simplicity.

Anything you all can fill me in on would be great, thanks in advance.