Users custom 4.6 project crashes on load

MachineId:DE189244480D3CD0F8CA729A02DD38A6
EpicAccountId:75f47e038a8442f0af6c18e1f38eeb85

Unknown exception - code 00000001 (first/second chance not available)

Assertion failed: Field [File:D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.6\Engine\Source\Runtime\Engine\Private\Collision\CollisionProfile.cpp] [Line: 363] 

KERNELBASE + 37901 bytes
UE4Editor_Core + 3092333 bytes
UE4Editor_Core + 1597672 bytes
UE4Editor_Core + 1479042 bytes
UE4Editor_Engine + 11681666 bytes
UE4Editor_Engine + 11629203 bytes
UE4Editor_Engine + 14155613 bytes
UE4Editor_Engine + 6250867 bytes
UE4Editor_CoreUObject + 394351 bytes
UE4Editor_CoreUObject + 394046 bytes
UE4Editor_CoreUObject + 394046 bytes
UE4Editor_CoreUObject + 394046 bytes
UE4Editor_CoreUObject + 1592305 bytes
UE4Editor_CoreUObject + 1478354 bytes
UE4Editor!FEngineLoop::PreInit() + 9130 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.6\engine\source\runtime\launch\private\launchengineloop.cpp:1281]
UE4Editor!GuardedMain() + 236 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.6\engine\source\runtime\launch\private\launch.cpp:110]
UE4Editor!GuardedMainWrapper() + 26 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.6\engine\source\runtime\launch\private\windows\launchwindows.cpp:126]
UE4Editor!WinMain() + 249 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.6\engine\source\runtime\launch\private\windows\launchwindows.cpp:202]
UE4Editor!__tmainCRTStartup() + 329 bytes [f:\dd\vctools\crt\crtw32\dllstuff\crtexe.c:618]