fix migration creation issue due to DiffModelMixin
fix migration creation issue due to DiffModelMixin

open-cloud/xos,cboling/xos,open-cloud/xos,open-cloud/xos,zdw/xos,opencord/xos,zdw/xos,zdw/xos,cboling/xos,opencord/xos,opencord/xos,zdw/xos,cboling/xos,cboling/xos,cboling/xos