I have two Object, Current Relationship is Look Up I am trying change it to M-D. In change Field Type the field itself is "Grayed Out" with this Info.
My Intial requirement was Master-Detail because of Data First I Created Look-Up so That i Can change it to M-D
I have Double Checked it "All Child Record Have a Parent Value In Look-Up Relation" and there is only one M-D relation with another Object.
I can able to do it In Sandbox Even I tried to move the field with Change Set It is Not Validating Error is