what is the difference between CURRENTLY ENABLED and ENABLED in Model Options tab settings in Environments

what is the difference between "CURRENTLY ENABLED" and "ENABLED"  in  "Model Options"  settings. How can I enable "CURRENTLY ENABLED"  option why because we are not able to do that.  please find below screen shot.                                                                                                                                                    CURRENTLY ENABLED                ENABLED*
1 answers

Currently enables means that it is the current setting of your running application. Enabled means if the setting is enabled in your configuration. If these differ, you need to restart your server.