Inline Editing for certain fields only

I have a table with inline editing. I can edit the field ok, but to save each change, i have to click off the datatable. If I select the datatable, I get a error:

uncaught exception: Unable to automatically determine field from source. Please specify the field name. For more information, please refer to https://datatables.net/tn/11

I assume the issue is that only certain fields can be edited onclick. BUt my onlick code is this:

$('#myTable').on( 'click', 'tbody td:not(:first-child)', function (e) {
editorSignIn.inline( this, {
onBlur: 'submit'
} );
} );

How can I change it so only certain fields are onClick

thanks