Media Management Error at 99%

Lately I always get an media management error after 99% of completing the task.
The error says: LmInvalidnodeException: Node with ID 1 not found.
Any ideas?
PC/WIn10/Resolve Studio17
The error says: LmInvalidnodeException: Node with ID 1 not found.
Any ideas?
PC/WIn10/Resolve Studio17