Expression evaluation error [evaluation ID = 8bac2:ea07c] : [Lcom.appiancorp.core.data.Dictionary; cannot be cast to com.appiancorp.core.data.FieldAddressable

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I was able to trace this issue down to the interface object. The new error from the design view when I click the EDIT link is:

Could not display interface. Please check definition and inputs. Interface Definition: Expression evaluation error at function a!dropdownField [line 454]: A dropdown component [label="Relationship to Child"] has an invalid value for "choiceValues". Duplicate items are not allowed in the choiceValues array, but choiceValues was 4; 15; 54; 23; 27; 28; 29; 37; 41; 42; 43; 40; 44; 1; 2; 3; 4; 5; 6; 7; 8; 46; 9; 10; 11; 12; 13; 14; 15; 47; 16; 49; 48; 17; 18; 19; 54; 50; 51; 52; 53; 55; 20; 21; 56; 78; 39; 22; 57; 58; 59; 60; 23; 24; 25; 26; 61; 62; 63; 27; 28; 45; 29; 64; 65; 30; 77; 70; 66; 67; 68; 69; 31; 32; 33; 34; 71; 72; 35; 73; 74; 36; 37; 75; 38.

and the code segment is :

      item: a!dropdownField(
            label: if(
              local!isDependent,
              "Relationship to Parent",
              "Relationship to Child"
            ),
            placeholder: "Please select a relationship",
            choiceLabels: if(
              local!isDependent,
              if(
                contains(tointeger(local!lkupDepChildRelationshipType.childRelationshipTypeId),ri!droRecPersonLinks.childRelationshipTypeId),
                local!lkupDepChildRelationshipType.childRelationshipTypeDesc,
                index(
                  append(
                    local!lkupDepChildRelationshipType,
                    rule!droQueryLkupChildRelationshipTypeEntity(childRelationshipTypeId: ri!droRecPersonLinks.childRelationshipTypeId)
                  ),
                  "childRelationshipTypeDesc"
                )
              ),
              if(
                contains(tointeger(local!lkupPrimaryChildRelationshipType.childRelationshipTypeId),ri!droRecPersonLinks.childRelationshipTypeId),
                local!lkupPrimaryChildRelationshipType.childRelationshipTypeDesc,
                index(
                  append(
                    local!lkupPrimaryChildRelationshipType,
                    rule!droQueryLkupChildRelationshipTypeEntity(childRelationshipTypeId: ri!droRecPersonLinks.childRelationshipTypeId)
                  ),
                  "childRelationshipTypeDesc"
                )
              )
              /*remove(touniformstring(local!lkupPrimaryChildRelationshipType.childRelationshipTypeDesc), wherecontains({"OBLIGEE"}, trim(touniformstring(local!lkupPrimaryChildRelationshipType.childRelationshipTypeDesc))))*/
            ),
            choiceValues: if(
              local!isDependent,
              if(
                contains(tointeger(local!lkupDepChildRelationshipType.childRelationshipTypeId),ri!droRecPersonLinks.childRelationshipTypeId),
                local!lkupDepChildRelationshipType.childRelationshipTypeId,
                index(
                  append(
                    local!lkupDepChildRelationshipType,
                    rule!droQueryLkupChildRelationshipTypeEntity(childRelationshipTypeId: ri!droRecPersonLinks.childRelationshipTypeId)
                  ),
                  "childRelationshipTypeId"
                )
              ),
              /*remove(touniformstring(local!lkupPrimaryChildRelationshipType.childRelationshipTypeDesc), wherecontains({"OBLIGEE"}, trim(touniformstring(local!lkupPrimaryChildRelationshipType.childRelationshipTypeDesc))))*/
              if(
                contains(tointeger(local!lkupPrimaryChildRelationshipType.childRelationshipTypeId),ri!droRecPersonLinks.childRelationshipTypeId),
                local!lkupPrimaryChildRelationshipType.childRelationshipTypeId,
                index(
                  append(
                    local!lkupPrimaryChildRelationshipType,
                    rule!droQueryLkupChildRelationshipTypeEntity(childRelationshipTypeId: ri!droRecPersonLinks.childRelationshipTypeId)
                  ),
                  "childRelationshipTypeId"
                )
              )
            ),
            value: ri!droRecPersonLinks.childRelationshipTypeId,
            saveInto: ri!droRecPersonLinks.childRelationshipTypeId,
            disabled: not(local!isEditable)
          ),