we are having an issue that i feel may be similar, so I thought i would add some information assuming it is.
We are simply trying to add anser options, or change the order, or anything, and it will not save. It throws a 500 error I am pasting below, complaining about unique answer option codes. However, they are unique. As it only lets one answer option exist, i found i can bulk add them if removing everything, but then any changes and the issues reoccurs.
We are using postgres as the database back end.

{"success":false,"message":"Question has been stored, but an error happened: \nAnswer option couldn't be saved. Error: Array\n(\n [code] => Array\n (\n [0] => Answer codes must be unique by question\n )\n\n)\n","error":{"code":500,"type":"LSJsonException","errorCode":0,"message":"Question has been stored, but an error happened: \nAnswer option couldn't be saved. Error: Array\n(\n [code] => Array\n (\n [0] => Answer codes must be unique by question\n )\n\n)\n","file":"\/var\/www\/html\/application\/controllers\/admin\/questionedit.php","line":297,"trace":"#0 [internal function]: questionedit->saveQuestionData()\n#1 \/var\/www\/html\/framework\/web\/actions\/CAction.php(109): ReflectionMethod->invokeArgs()\n#2 \/var\/www\/html\/application\/core\/Survey_Common_Action.php(86): CAction->runWithParamsInternal()\n#3 \/var\/www\/html\/framework\/web\/CController.php(308): Survey_Common_Action->runWithParams()\n#4 \/var\/www\/html\/framework\/web\/CController.php(286): CController->runAction()\n#5 \/var\/www\/html\/framework\/web\/CController.php(265): CController->runActionWithFilters()\n#6 \/var\/www\/html\/application\/controllers\/AdminController.php(180): CController->run()\n#7 \/var\/www\/html\/framework\/web\/CWebApplication.php(282): AdminController->run()\n#8 \/var\/www\/html\/framework\/web\/CWebApplication.php(141): CWebApplication->runController()\n#9 \/var\/www\/html\/framework\/base\/CApplication.php(185): CWebApplication->processRequest()\n#10 \/var\/www\/html\/index.php(182): CApplication->run()\n#11 {main}","traces":[{"function":"saveQuestionData","class":"questionedit","type":"->","file":"unknown","line":0},{"file":"\/var\/www\/html\/framework\/web\/actions\/CAction.php","line":109,"function":"invokeArgs","class":"ReflectionMethod","type":"->"},{"file":"\/var\/www\/html\/application\/core\/Survey_Common_Action.php","line":86,"function":"runWithParamsInternal","class":"CAction","type":"->"},{"file":"\/var\/www\/html\/framework\/web\/CController.php","line":308,"function":"runWithParams","class":"Survey_Common_Action","type":"->"},{"file":"\/var\/www\/html\/framework\/web\/CController.php","line":286,"function":"runAction","class":"CController","type":"->"},{"file":"\/var\/www\/html\/framework\/web\/CController.php","line":265,"function":"runActionWithFilters","class":"CController","type":"->"},{"file":"\/var\/www\/html\/application\/controllers\/AdminController.php","line":180,"function":"run","class":"CController","type":"->"},{"file":"\/var\/www\/html\/framework\/web\/CWebApplication.php","line":282,"function":"run","class":"AdminController","type":"->"},{"file":"\/var\/www\/html\/framework\/web\/CWebApplication.php","line":141,"function":"runController","class":"CWebApplication","type":"->"},{"file":"\/var\/www\/html\/framework\/base\/CApplication.php","line":185,"function":"processRequest","class":"CWebApplication","type":"->"},{"file":"\/var\/www\/html\/index.php","line":182,"function":"run","class":"CApplication","type":"->"}]},"redirectTo":"\/index.php\/admin\/questioneditor\/sa\/view\/surveyid\/546757\/gid\/8\/qid\/33"}

attaching the full debug for you

Hey guys! Are you still able to reproduce the issue? There was in the past some problem with certain question attributes which were solved. In case it is still reproducible, please provide a simple .lss file. Thanks for help :)

No feedback provided.
Please test in 4.4.0 RC1