If the project has used full automation of change orders (integration with Endre or similar), there may sometimes be an extra income line of NOK 0 left over from before the relationship between the Change Order Sub and the Change Order Client was set up correctly.
These are leftovers from an early phase of the change order, and the line can safely be deleted manually without affecting the final forecast.
Important: if the line has linked costs, you should first link those costs to the right income line before deleting the zero line.