A doubtful codeshare

[Rainbowdancer]

Me I'm just a pilot at Lufthansa VA. When I booked my flight today I took a codeshare route from Uk Direct for the Airbus A320 labeled UKD0620 EGCC->EDDF. Then it says that I have booked a conflict route, so I only could get 85 Passengers instead of 150. Peering all through the tables of both VAs I can't find a conflict route anyway. The only route is from UK Direct and Lufthansa VA has no route like that. What's wrong with that?

thanx for help