Help with these error messages?

[Moog78]

I uploaded a pack or roads to the workshop yesterday and they work fine but give the following error upon loading:

Duplicate assets...
1545637713.Basic Road Bridge0
1545637713.Basic Road Bridge1
1545637713.Basic Road Elevated0
1545637713.Basic Road Elevated1
1545637713.Basic Road Slope0
1545637713.Basic Road Slope1
1545637713.Basic Road Tunnel0
1545637713.Basic Road Tunnel1
1545637713.HighwayRampPillar
1545637713.Oneway Road Bridge0
1545637713.Oneway Road Elevated0
1545637713.RoadSmallBridgePillar

any idea how to fix this without breaking anyone's save games?

 

[Avanya]

Are those using the default modesl for those bits?

It isn't really an issue though, afaik dublicates don't do anything problematic and the assets still work like they should.