I'm using the Lightning Datatable component as an editable table.
When I click the Save button I am able to retrieve the draftValues however the record Id's are not stored, only the row id of the table, for example id=row-1.

So when I call my Apex controller to save the values I get the exception:

FATAL_ERROR|System.DmlException: Update failed. First exception on row 0; first error: MISSING_ARGUMENT, Id not specified in an update call: []