Asset Key Flexfield - one of the segments as date

Summary:

Is it possible to set-up one of the the Key Asset Flexfield segments as date?
Meaning the
Validation Type Independent / or alternatively/ Format Only
Value Data Type Date
?
In Manage structures I keep getting error:

The value set **** cannot be assigned to this segment ****. (FND-2654) In application 140, key flexfield KEY#, and structure ****, default value set ****cannot be assigned to segment ****which uses column SEGMENT5. The assigned value set must have a data type that is compatible with the column data type and its maximum length must be no longer than the column length and its validation type must not be view object.