Kintone will be holding a scheduled maintenance update on July 10th 2015.
This is the 2nd announcement for the Kintone API updates - please find the first announcement here .

• During an edit of a record, if a deleted option has been specified as the value of a Drop-down field, an error occurs for the below APIs and events.
  • After the fix, the API will follow these rules:
    • Deleted options can be set if that option exists in other records
    • Deleted options cannot be set, if that option does not exist in any record
    • Options that do not exist cannot be set
  • API in concern
    • Set Record Value (kintone.app.record.set())
  • Events in concern
    • Record List Event : When Clicking the Save Button
    • Record List Event : When a Field Value Changes
    • Record Details Event : When Updating Business Processes
    • Record Create Event : On the Record Create Page
    • Record Create Event : When Clicking the Save Button
    • Record Create Event : When a Field Value Changes
    • Record Edit Event : On the Record Edit Page
    • Record Edit Event : When Clicking the Save Button
    • Record Edit Event : When a Field Value Changes

• The specifications for date formats will be changed.

  • Before

    FIELD TYPE	FORMAT	DESCRIPTION
    Date	YYYY-MM-DD	Note that this is not converted to UTC.

  • After

    FIELD TYPE	FORMAT	DESCRIPTION
    Date	YYYY-MM-DD	Note that this is not converted to UTC. The below date formats can be used: 2015 2015-07 2015-7 2015-7-5 If the date and/or month is ignored, it will be supplemented with 01. 2015 -> 2015-01-01 2015-07 -> 2015-07-01 2015-7 -> 2015-07-01 2015-7-5 -> 2015-07-05

• Error displayed when a Lookup field was edited using an API token

  • Before

    1 2 3 4 5

    { "message": "A value <specified_value> in field lookup does not exist in the datasource app for lookup.", "id": "1505999166-1826147121", "code": "GAIA_LO04" }

  • After

    1 2 3 4 5

    { "message": "You cannot edit a lookup field with an API token.", "id": "1505999166-679475063", "code": "GAIA_AT01" }