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When you use 'Organize columns' and 'move selection to top' in atribute table you can crash your data integrity.

To reproduce this bug you will need a layer with more than 14 columns and more than
45 rows. That is the specification of our smaler table. We have tried with
a smaller table and we don't get any error.

1 - pick up the atribute table (postgres with geometry or shapefile),
right click in a column name and select 'Organize columns...'
2 - Reorder the columns. Thinking in column position like a list, try a
sequence that bring to initial positions the end elements. In a example
14,12,5,1,2...
3 - Back to the table, start edition.
4 - Click at QGIS numerator of feature in table. this will turn editable the cell of
the column 14 (remind the example above),
5 - Chose in menu table 'move selection to top'
6 - look for the atribute's of column 14, it will apear in another column
of the same selected object.