Looks like I answered my own question, or at least a way to make it work. Looks like since I was using json data with loadonce: true, the id lookup for a reload was using the “localReader” id, which defaults to _id_(in our case 'idPrefixxx'). The reload then concatenates the idPrefix with the id retrieved from the row, leading to a duplicated idPrefix. If we use key:true in a col in our model that also represents the id of the row, we are all set, as the reload method will take *that* id instead of the rowid.