The map specified on the commandline 'Game/firstPersonBP/Maps/FirstPersonExampleMap' could not be found.existing

hi there,

I hope someone could help.

I renamed the default map from “FirstPersonExampleMap” to “NightScene” and duplicate it to create a “DayScene”

After packing the game I tried to open it I got this error. Then I went to ProjectSetting>Maps&Modes to check the default map and it was “NightScene”

I do not understand why I’m still getting the error.

Could anybody help me with this?
Many Thanks

rename the map, or duplicate → rename → set new map in project-settings:

see there: