change of >indirect cost %< in items is unexpected rolled back

Some items are attributed with an percentage of indirect cost using the field >indirect cost %<.
The old value is 3.11. Now I was to change all items to have them the value of 6.12.

I used the action “set item prices” where this field is one of the options.

After this run all items got the new values, but after a while (don’t know how long) the old values appered again.

What is the reason of this behavior?

In my test-copy, where no purchases are done, the change last until now.

Thanks for your hints!

Check in Change log if you set it up on Item Table…

change lo is set on item table with “some fields” on every column.

there are no entries shown in the olg table.