Trying to install LS 3.0.1 on IIS + MSSQL 2016. All required drivers/libs installed. Setup is ok until the "populate database". Seems like a PK constraint cannot be applied on a column (NULL). This is the error I get at this step in IE webpage :

CDbCommand failed to execute the SQL statement: SQLSTATE[42000]: [Microsoft][ODBC Driver 13 for SQL Server][SQL Server]Cannot define PRIMARY KEY constraint on nullable column in table 'lime_groups'. #0 C:\inetpub\wwwroot\limesurvey\framework\db\CDbCommand.php(1352): CDbCommand->execute()
#1 C:\inetpub\wwwroot\limesurvey\installer\create-database.php(125): CDbCommand->createTable('{{groups}}', Array)
#2 C:\inetpub\wwwroot\limesurvey\application\controllers\InstallerController.php(904): createDatabase(Object(DbConnection))
#3 C:\inetpub\wwwroot\limesurvey\application\controllers\InstallerController.php(519): InstallerController->_setup_tables('C:\inetpub\wwwr...')
#4 C:\inetpub\wwwroot\limesurvey\application\controllers\InstallerController.php(82): InstallerController->stepPopulateDb()
#5 C:\inetpub\wwwroot\limesurvey\framework\web\CWebApplication.php(282): InstallerController->run('populatedb')
#6 C:\inetpub\wwwroot\limesurvey\framework\web\CWebApplication.php(141): CWebApplication->runController('installer/popul...')
#7 C:\inetpub\wwwroot\limesurvey\framework\base\CApplication.php(185): CWebApplication->processRequest()
#8 C:\inetpub\wwwroot\limesurvey\index.php(195): CApplication->run()
#9 {main}