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    Why is my Change Field Type button missing on Master Detail fields?

    Posted by Manpreet on March 29, 2017 at 1:38 pm

    In some instances your Change Field Type button may be missing when trying to change a master detail field into a lookup field.Why?

    Saurabh replied 7 years, 9 months ago 2 Members · 1 Reply
  • 1 Reply

  • Saurabh

    Member
    March 29, 2017 at 1:50 pm

    Hi Manpreet
    This is generally due to one of the following:

    a) The master object has an existing Roll Up Summary field for data on the child object. In this case it is necessary to delete the Roll-Up Summary field on the parent object to permit the Master-detail field type to be changed.

    b) There is a cross object Workflow Field Update defined for the child object to update a record on the parent. Cross object field updates only work on master detail relationship. In this case it is necessary to delete the cross-object field update to permit the Master-detail field type to be changed.

    Hope this may help you:

    Thanks

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