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This funcion is best started in the Works area. The example below uses the Shostakovich Cello Concerto No.1. There are 2 instances of the work in this OPAS database. The first (top line) is an incorrect or duplicate entry. The second (highlighted in yellow) is the proper entry. To remove the incorrect version of the Cello Concerto (the top line) you must first move its performance history to the second work. OPAS will not let you delete a work when there is something (such as performances) attached to the work.

Clicking the Perf. Hist. tab for the top work reveals 15 performances assigned to it. To move these 15 performances of the first work to the second work:
1. While on the Perf. Hist. screen, click the Linked Data icon at the top of the OPAS screen (the 'handshake' icon), or press the F11 key on your keyboard. From the resulting pop-up menu, select Date-Works… this will open the OPAS Date-Works area to the List screen and load each performance of the work
2.From this list screen click the Function icon (the 'cogged wheel' icon second from the left circled in red above) and choose the function called Change Work. Then click the large Start Function button3. OPAS will display the work select screen. Choose the Composer at the top and the work to which you wish to transfer the performance history. Then click OK. The highlighted work is the work to which the performance history will be moved.
OPAS will display a confirmation window to ensure that you are moving or changing the performance history from the first work to the second. Click Yes at this window/prompt
4. The progress bar will show the movement of the function. When the function is complete, click the Close button to close the function window. OPAS and will then display a 'No Records Found!' message. This is because the original search that brought you to this List screen (all performances of “Concerto for Cello No. 1") is no longer valid since you moved the performances to the “Concerto, Cello, No. 1, Op. 107” work.
5. Press any key or click your mouse, then click the green OK in the lower left-hand corner of the screen to return to the Works area of OPAS.
6. Finally, simply click the green Refresh icon at the top of the Perf. Hist. screen for the composition, and the performance history will be blank.
If you look up the second 'version' or instance of the work in the database, the performance history will now be attached to it.
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