This is the (pretty printed) result of the HTTP request we get when removing a comment in a custom application:
```
{
"error": null,
"payload": {
"dialog": "<form method=\"POST\" class=\"aphront-dialog-view aphront-exception-dialog aphront-dialog-view-standalone\" data-sigil=\"jx-dialog\"><input type=\"hidden\" name=\"__csrf__\" value=\"B@hugfzqln09396f681a5db512\" \/><input type=\"hidden\" name=\"__form__\" value=\"1\" \/><input type=\"hidden\" name=\"__dialog__\" value=\"1\" \/><div class=\"aphront-dialog-head\"><div class=\"phui-action-header sprite-gradient gradient-lightblue-header\"><h3 class=\"phui-action-header-title\">Unhandled Exception ("AphrontDuplicateKeyQueryException")<\/h3><\/div><\/div><div class=\"aphront-dialog-body grouped\"><div class=\"aphront-unhandled-exception\"><div class=\"exception-message\">#1062: Duplicate entry 'PHID-USER-cqavrovfv3fqflsmgdas-PHID-XACT-PPRR-qlfxezfpx6632u6' for key 'key_draft'<\/div><\/div><\/div><div class=\"aphront-dialog-tail grouped\"><a href=\"\/\" class=\"button grey\" name=\"__cancel__\" data-sigil=\"jx-workflow-button\" data-meta=\"6_0\">Close<\/a><\/div><\/form>"
},
"javelin_metadata": [
[
]
],
"javelin_behaviors": {
"dark-console": [
{
"uri": "\/transactions\/remove\/PHID-XACT-PPRR-qlfxezfpx6632u6\/",
"key": "cylmwpslzekqlsyyi3wrhq6l",
"color": "#ff0000"
}
]
},
"javelin_resources": [
"https:\/\/code.pageuppeople.com\/res\/phabricator\/a5ff7d87\/core.pkg.css",
"https:\/\/code.pageuppeople.com\/res\/phabricator\/83e2cc86\/rsrc\/css\/layout\/phabricator-action-header-view.css",
"https:\/\/code.pageuppeople.com\/res\/phabricator\/df001cab\/darkconsole.pkg.js",
"https:\/\/code.pageuppeople.com\/res\/phabricator\/14887b3d\/core.pkg.js",
"https:\/\/code.pageuppeople.com\/res\/phabricator\/b88ab49e\/rsrc\/externals\/javelin\/core\/init.js"
]
}
```
The exception is:
```
#1062: Duplicate entry 'PHID-USER-cqavrovfv3fqflsmgdas-PHID-XACT-PPRR-qlfxezfpx6632u6' for key 'key_draft'
```
Is this something I've forgotten to hook up / call correctly, or is the infrastructure not working here?