Cannot find the object after upgrade to 20.10.28 - "_FDS" tables

After the upgrade this error is raised for various (not all) tables when trying to execute from SQL Server source. 

It includes some table names with the "_FDS" extension. I tried googling the _FDS but nothing comes up, neither in TxT documentation nor outside. 

Anyone who can give me a clue on how to proceed? 

Error example:
"Cannot find the object "DIRPARTYTABLE_FDS" because it does not exist or you do not have permissions."

I can solve this be re-deploying each table but of course that is a very sub-optimal choice :(


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