In our case, we dropped a DLT pipeline and recreated the pipeline. Dropping DLT pipeline dropped the tables with constraints. After recreating the DLT pipeline and rerunning the job, it throws this error. Now, the table is not available and the constraint is not available in meta data(information_schema.tables has no tables associated with dlt  and no data in information_schema.table_constraints) . Yet, it throws this error. Any help would be much appreciated. Thank you