Every core Flex List has a List Mapping Setting. The core Flex List Mapping Settings are in place in case the lists are renamed or replaced.
Do not change the primary list mapping setting name – only the value can change if the function “Change a List Name” is utilized.
It is not necessary for Custom lists to have List Mapping Settings.
Setting Name: [ListName]ListMapping
Setting Value: [ListName]
Every List should have a Singular Setting to manage the singular terms used by Flex.
Setting Name: [ListName]Singular
Setting Value: Singular List Name
If there is no Singular setting for a List then Flex will add the plural [ListName] to the locations where a singular name makes more sense.