I checked the DQS Main Log and see the following Information :
1/13/2021 11:26:57 AM|[]|19|ERROR|1964be93-d034-4ce2-822f-face9cd1d7e4|Microsoft.Ssdqs.Core.Flow.FlowExecuter|Flow ended with an application error.
Microsoft.Ssdqs.Core.Context.ResponseException: Failed to execute calibrator, or an error occurred during calibration. ---> System.Data.SqlClient.SqlException: The DELETE statement conflicted with the REFERENCE constraint "B_INDEX_LEXICON_EXTENSION_B_INDEX_LEXICON_FK". The conflict occurred in database "DQS_PROJECTS", table "KnowledgeManagement1000001.B_INDEX_LEXICON_EXTENSION", column 'TERM_ID'.;
The statement has been terminated.;