Submitted some Phame comments.
- No more error log errors about VersionedDraft keys.
- Saw only one preview request when loading the page instead of two.
Here's the specific stack trace I caught:
```
[Mon Sep 05 12:15:33.639930 2016] [:error] [pid 50608] [client 127.0.0.1:55278] [2016-09-05 14:15:33] EXCEPTION: (AphrontDuplicateKeyQueryException) #1062: Duplicate entry 'PHID-POST-fknnpzjnsdgc3rqobhst-PHID-USER-pr5rjpuilpfserepsd2k-13' for key 'key_object' at [<phutil>/src/aphront/storage/connection/mysql/AphrontBaseMySQLDatabaseConnection.php:314]
[Mon Sep 05 12:15:33.640801 2016] [:error] [pid 50608] [client 127.0.0.1:55278] arcanist(head=master, ref.master=9e82ef979e81), corgi(head=master, ref.master=5b9171222bc9), instances(head=stable, ref.master=485bc8128198, ref.stable=2983bc917601), ledger(head=master, ref.master=4da4a24b8779), libcore(), phabricator(head=phame2, ref.master=4b6da9735ba7, ref.phame2=4b6da9735ba7), phutil(head=stable, ref.master=97f05269fdb1, ref.stable=c14343ee620e), services(head=stable, ref.master=1fcb5cdb7582, ref.stable=2d8088a5b4b3)
[Mon Sep 05 12:15:33.640815 2016] [:error] [pid 50608] [client 127.0.0.1:55278] #0 <#2> AphrontBaseMySQLDatabaseConnection::throwCommonException(integer, string) called at [<phutil>/src/aphront/storage/connection/mysql/AphrontBaseMySQLDatabaseConnection.php:348]
[Mon Sep 05 12:15:33.640830 2016] [:error] [pid 50608] [client 127.0.0.1:55278] #1 <#2> AphrontBaseMySQLDatabaseConnection::throwQueryCodeException(integer, string) called at [<phutil>/src/aphront/storage/connection/mysql/AphrontBaseMySQLDatabaseConnection.php:289]
[Mon Sep 05 12:15:33.640833 2016] [:error] [pid 50608] [client 127.0.0.1:55278] #2 <#2> AphrontBaseMySQLDatabaseConnection::throwQueryException(mysqli) called at [<phutil>/src/aphront/storage/connection/mysql/AphrontBaseMySQLDatabaseConnection.php:185]
[Mon Sep 05 12:15:33.640836 2016] [:error] [pid 50608] [client 127.0.0.1:55278] #3 <#2> AphrontBaseMySQLDatabaseConnection::executeRawQuery(string) called at [<phutil>/src/xsprintf/queryfx.php:8]
[Mon Sep 05 12:15:33.640839 2016] [:error] [pid 50608] [client 127.0.0.1:55278] #4 <#2> queryfx(AphrontMySQLiDatabaseConnection, string, string, string, array, string)
[Mon Sep 05 12:15:33.640841 2016] [:error] [pid 50608] [client 127.0.0.1:55278] #5 <#2> call_user_func_array(string, array) called at [<phutil>/src/aphront/storage/connection/AphrontDatabaseConnection.php:42]
[Mon Sep 05 12:15:33.640844 2016] [:error] [pid 50608] [client 127.0.0.1:55278] #6 <#2> AphrontDatabaseConnection::query(string, string, string, array, string) called at [<phabricator>/src/infrastructure/storage/lisk/LiskDAO.php:1261]
[Mon Sep 05 12:15:33.640846 2016] [:error] [pid 50608] [client 127.0.0.1:55278] #7 <#2> LiskDAO::insertRecordIntoDatabase(string) called at [<phabricator>/src/infrastructure/storage/lisk/LiskDAO.php:1106]
[Mon Sep 05 12:15:33.640849 2016] [:error] [pid 50608] [client 127.0.0.1:55278] #8 <#2> LiskDAO::insert() called at [<phabricator>/src/infrastructure/storage/lisk/LiskDAO.php:1075]
[Mon Sep 05 12:15:33.640851 2016] [:error] [pid 50608] [client 127.0.0.1:55278] #9 <#2> LiskDAO::save() called at [<phabricator>/src/applications/draft/storage/PhabricatorVersionedDraft.php:65]
[Mon Sep 05 12:15:33.640854 2016] [:error] [pid 50608] [client 127.0.0.1:55278] #10 <#2> PhabricatorVersionedDraft::loadOrCreateDraft(string, string, integer) called at [<phabricator>/src/applications/transactions/editengine/PhabricatorEditEngine.php:1669]
[Mon Sep 05 12:15:33.640857 2016] [:error] [pid 50608] [client 127.0.0.1:55278] #11 <#2> PhabricatorEditEngine::buildCommentResponse(PhamePost) called at [<phabricator>/src/applications/transactions/editengine/PhabricatorEditEngine.php:894]
[Mon Sep 05 12:15:33.640859 2016] [:error] [pid 50608] [client 127.0.0.1:55278] #12 <#2> PhabricatorEditEngine::buildResponse() called at [<phabricator>/src/applications/phame/controller/post/PhamePostEditController.php:60]
[Mon Sep 05 12:15:33.640862 2016] [:error] [pid 50608] [client 127.0.0.1:55278] #13 <#2> PhamePostEditController::handleRequest(AphrontRequest) called at [<phabricator>/src/aphront/configuration/AphrontApplicationConfiguration.php:237]
[Mon Sep 05 12:15:33.640865 2016] [:error] [pid 50608] [client 127.0.0.1:55278] #14 phlog(AphrontDuplicateKeyQueryException) called at [<phabricator>/src/aphront/handler/PhabricatorAjaxRequestExceptionHandler.php:27]
[Mon Sep 05 12:15:33.640868 2016] [:error] [pid 50608] [client 127.0.0.1:55278] #15 PhabricatorAjaxRequestExceptionHandler::handleRequestException(AphrontRequest, AphrontDuplicateKeyQueryException) called at [<phabricator>/src/aphront/configuration/AphrontApplicationConfiguration.php:644]
[Mon Sep 05 12:15:33.640870 2016] [:error] [pid 50608] [client 127.0.0.1:55278] #16 AphrontApplicationConfiguration::handleException(AphrontDuplicateKeyQueryException) called at [<phabricator>/src/aphront/configuration/AphrontApplicationConfiguration.php:242]
[Mon Sep 05 12:15:33.640873 2016] [:error] [pid 50608] [client 127.0.0.1:55278] #17 AphrontApplicationConfiguration::processRequest(AphrontRequest, PhutilDeferredLog, AphrontPHPHTTPSink, MultimeterControl) called at [<phabricator>/src/aphront/configuration/AphrontApplicationConfiguration.php:149]
[Mon Sep 05 12:15:33.640879 2016] [:error] [pid 50608] [client 127.0.0.1:55278] #18 AphrontApplicationConfiguration::runHTTPRequest(AphrontPHPHTTPSink) called at [<phabricator>/webroot/index.php:17]
```