Setting Unique

[Ed Kleban]

The Valentina Kernel manual states:

" If the flag Unique is changed at runtime and a table is not empty, then
the index will be automatically rebuilt. This occurs because Valentina uses
different formats for indexing unique and non unique fields. The unique
index has more compact format because it does not need to store a count of
records for each value (for unique field it is always 1). "

But what happens if you set the unique flag, and the table gets indexed, but
it turns out the value really aren't unique?