Field type in parent CDT is getting changed from document to anytype when child CDT is updated

Question

Hello All, 
 We observed one issue 
 1. Parent CDT -> one of the columns type is document 
 2. We updated the child CDT (added a new column) upon updating the child CDT, the parent CDT filed type changed from document to anytype. 
 Did anyone face the same issue?

Mike Schmitt · Answer

Unknown said: If you modify it outside of Appian 
 This user is not saying they're modifying the CDT outside of Appian, though. 
 Sneha Yada , I just reproduced the described behavior in my TEST environment using 2 brand new CDTs (parent and child, similar to the ones you pictured). The Parent CDT has 2 separate fields of Document type, and after simply adding a new field to the Child CDT, the data type of the Document field in the Parent had changed itself to "Integer" instead. 
 This is definitely a bug. I recommend you open a Support Case with Appian - this is something they'll need to address. 
 Edit to add: I can also reproduce the behavior just by *minorly renaming* one of the fields in the Child CDT. As in, I didn't even have to add a *new* field to demonstrate the breakage.

Field type in parent CDT is getting changed from document to anytype when child CDT is updated

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