Attempting to set ID on two annot matches from the same encounter throws trivial error

[TanyaStere42]

Expected Behavior When confirming a match (/iaResults.jsp), clicking on the "set individual to..." button shows a Success message when the individual is set.

Current Behavior (WB-1669) When confirming a match, clicking on the "set individual to..." button shows an error message: Error updating encounter: Please enter a different individual id. The match is saved correctly, but confuses users because of the unnecessary error message.

Users have reported this in ACW, Whiskerbook, and Flukebook

QA Notes User provided a screen recording demonstrating the error: https://www.awesomescreenshot.com/video/20815954?key=8932e7a9c65bacf3ee567c5285b362b4

Community Link https://community.wildme.org/t/whiskerbook-new-id-error/834/3 https://community.wildme.org/t/confirm-match-btw-idd-target-un-idd-encounter-error-msg-but-refresh-pg-shows-id-updated/688 https://community.wildme.org/t/error-updating-encounter-please-enter-different-id/1495 https://community.wildme.org/t/error-when-doing-a-match/2384