Hi @Poonam_Dogra ,
No, you should not alter the table records. These are with respect to each recipient delivery. If you delete them, you will not be able to see error message with respect to each recipient.
If you want to group them and see what are different types of error that exist in the database, then use query activity. Use Group by functionality of query activity. Group the result by 'Reasons'.
Thanks,
Jyoti