am e2688b18: am 44c3d51b: am 13d744f2: am 466d8411: am 8d54a6e0: resolved conflicts for merge of b8fb609b to jb-mr1-dev

* commit 'e2688b18df75eceb4895fecaaf4f0ebd42f23ef7':
  Do not allow updates to the _data column.