hi all, how to handle the error when trying to do the "impact analysis

hi all,
how to handle the error when trying to do the "impact analysis" of CDT?
it seems in Appian 7.9, we cannot manually change the CDT version where it is being used.
"Impact Analysis" doesn't work. form which is referring to the CDT always throws error.

Any inputs will be appreciated.

OriginalPostID-182183

OriginalPostID-182183

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