Bug 24131: Prevent the first description to be displayed twice

Bug 24131: Prevent the first description to be displayed twice

If there are several lines to display, the first one was displayed
twice:
Upgrade to 19.12.00.071 done [13:10:22]: Bug 22887 - Add unique constraint to authorised_values
                                                   - Add unique constraint to authorised_values
                                                   - WARNING - Cannot create unique constraint on authorised_value(category, authorised_value)
                                                   - The following entries are duplicated: COUNTRY:aaa (2)

Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>