Updating CDT within an existing application

hi all,

what it the best pratice of updating a CDT withing an exsiting application?

i'm doing an enhanement recently. some new fields are added into one CDT and related sail forms or dashboards are also changed.
it works well in new processes. however, when we open old process instances' forms or dashboards, it throws error, saying, eg, CDT_name^10 doesn't have this property.

Any help is appreciated.

OriginalPostID-181232

OriginalPostID-181232