Hello Pavan,
Since you have already tried to change the type in ABAP Type Editor and still issue exists.
So i would suggest the following,
Write code in MPC_EXT class inside Define Method as below and this will solve the issue.
Get that particular Property which is causing issue and override the data element as below
METHOD define.
super->define( ).
DATA:
lo_entity TYPE REF TO /iwbep/if_mgw_odata_entity_typ,
lo_property TYPE REF TO /iwbep/if_mgw_odata_property.
lo_entity = model->get_entity_type( iv_entity_name = '<Entity>' ).
lo_property = lo_entity->GET_PROPERTY( IV_PROPERTY_NAME = '<Property>' ).
lo_property->set_type_edm_datetime( ).
lo_property->bind_data_element( iv_element_name = 'DATS' ).
ENDMETHOD.
Regards,
Ashwin