Cannot create new data tables after update
Valid from Pega Version 7.1.7
Data tables have been replaced by a new local data storage format. You can upgrade old-style data tables to use the new local data storage format, but the new format is not compatible with earlier versions of Pega 7 in which data tables could be created.
You can still edit legacy data tables by using the old data table functionality. However, to create new data tables, you must use the Data Explorer and Data Designer.