Change Details

Steps to reproduce: 1. Go to [this event](https://tools.wmflabs.org/grantmetrics-test/app.php/programs/Niharika%27s_Test/Test_2). 2. In the participants box, add: ``` oeiuretye iwruteyewior Doc Doc2 DoctorWho ``` Out of these the last three are valid but the first two are not. 3. Hit //Save participants// 4. The first two show up in red. 5. Navigate back to the program view. 6. Come back to the event Expected: The 3 valid names were saved and the invalid 2 were removed. Actual: All 5 named are removed. It can also be reproduced in [prod](https://tools.wmflabs.org/grantmetrics/programs/Fun-a-thon!/Bad_event).

Steps to reproduce: 1. Go to [this event](https://tools.wmflabs.org/grantmetrics-test/app.php/programs/Niharika%27s_Test/Test_2). 2. In the participants box, add: ``` oeiuretye iwruteyewior Doc Doc2 DoctorWho ``` Out of these the last three are valid but the first two are not. 3. Hit //Save participants// 4. The first two show up in red. 5. Navigate back to the program view. 6. Come back to the event Expected: The 3 valid names were saved and the invalid 2 were removed. Actual: All 5 named are removed. {F24873859} It can also be reproduced in [prod](https://tools.wmflabs.org/grantmetrics/programs/Fun-a-thon!/Bad_event).

Steps to reproduce: 1. Go to [this event](https://tools.wmflabs.org/grantmetrics-test/app.php/programs/Niharika%27s_Test/Test_2). 2. In the participants box, add: ``` oeiuretye iwruteyewior Doc Doc2 DoctorWho ``` Out of these the last three are valid but the first two are not. 3. Hit //Save participants// 4. The first two show up in red. 5. Navigate back to the program view. 6. Come back to the event Expected: The 3 valid names were saved and the invalid 2 were removed. Actual: All 5 named are removed. {F24873859} It can also be reproduced in [prod](https://tools.wmflabs.org/grantmetrics/programs/Fun-a-thon!/Bad_event).