NE_UNQUE Not Unique Across All Network Types

Just encountered the below issue when adding members to a GOS in NM0110:

The datum element with NE_UNIQUE of 12801 can’t be added as a member of the Group of Sections because there is a GOS record with the same unique id. We are using NM0110 as a workaround because the AWLRS Web App has a defect (Defect Report TFS #1100521). Fortunately, we can still use Spatial Manager and we were able to complete this task. I did a search using the above message and nothing came up in this forum. Has anybody come across this issue?