Format Duration int to Datetime D HH:mm:SS

Just to make sure everything is in order.  Your original field, which expressed the data in Minutes as a whole number, will be of data type 'Whole Number', but all subsequent fields should be either a decimal number type, or a date/time style number type.

Duration is only a datatype within Edit Queries (Power Query Language, known as M), but is not a data type you can select in the Power BI Data Model itself.  Duration is best kept as a decimal number, but you can format it yourself when trying to display on a report.  This could be done using another measure and the FORMAT statement, or by using some math tricky to build out a TEXT value to display how you wish.

For example:

Display Duration = VAR hours = FLOOR([SumNewDurationINConditoon] * 24, 1)
var minutes = FLOOR(([SumNewDurationINConditoon] * 24 * 60) - (hours * 60), 1)
RETURN
hours & ":" & minutes